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Paper - Further contributions to the study of the evolution of the forebrain 5 - Revision history
2024-03-29T05:14:32Z
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Z8600021: /* B. Form Changes in the Evolution of the Hemispheres */
2017-02-04T02:56:10Z
<p><span dir="auto"><span class="autocomment">B. Form Changes in the Evolution of the Hemispheres</span></span></p>
<a href="https://embryology.med.unsw.edu.au/embryology/index.php?title=Paper_-_Further_contributions_to_the_study_of_the_evolution_of_the_forebrain_5&diff=269888&oldid=269886">Show changes</a>
Z8600021
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Z8600021: /* A. General Considerations */
2017-02-04T02:53:21Z
<p><span dir="auto"><span class="autocomment">A. General Considerations</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 13:53, 4 February 2017</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">first </del>of all it is very clear that the region of the prechordal brain cannot be divided into segments which, taken with sense organs and transient or persistent <del style="font-weight: bold; text-decoration: none;">nerve— </del>and <del style="font-weight: bold; text-decoration: none;">muscle—e ements</del>, may be described as head segments. The writer abandons his earlier recognition of two or more head segments in this region and accepts, in general terms, the views of Neal (’98, ’14, ’18, ’19) as to brain segmentation.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">First </ins>of all it is very clear that the region of the prechordal brain cannot be divided into segments which, taken with sense organs and transient or persistent <ins style="font-weight: bold; text-decoration: none;">nerve — </ins>and <ins style="font-weight: bold; text-decoration: none;">muscle — elements</ins>, may be described as head segments. The writer abandons his earlier recognition of two or more head segments in this region and accepts, in general terms, the views of Neal (’98, ’14, ’18, ’19) as to brain segmentation.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>There is no definite evidence that these structures ever existed and have aborted. In the absence of these structures it is impossible to speak of head segments. The suggestion is offered that the region represented by the first brain segment of Neal is in reality a <del style="font-weight: bold; text-decoration: none;">pre—metameric </del>region. This <del style="font-weight: bold; text-decoration: none;">pre—metameric </del>region contains the forebrain, paired eyes and olfactory organs, the pineal eye, palaeostoma, hypophysis, infundibulum, and <del style="font-weight: bold; text-decoration: none;">pre— </del>chordal mesoderm. In a}! the rest of the head and body the metamerism is complete; that is, each metamere includes somatic and visceral effective nervous mechanisms and muscles as well as sensory systems and correlating nerve centers.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>There is no definite evidence that these structures ever existed and have aborted. In the absence of these structures it is impossible to speak of head segments. The suggestion is offered that the region represented by the first brain segment of Neal is in reality a <ins style="font-weight: bold; text-decoration: none;">pre-metameric </ins>region. This <ins style="font-weight: bold; text-decoration: none;">pre-metameric </ins>region contains the forebrain, paired eyes and olfactory organs, the pineal eye, palaeostoma, hypophysis, infundibulum, and <ins style="font-weight: bold; text-decoration: none;">pre-</ins>chordal mesoderm. In a}! the rest of the head and body the metamerism is complete; that is, each metamere includes somatic and visceral effective nervous mechanisms and muscles as well as sensory systems and correlating nerve centers.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Adelmann (’22) from a study of the prechordal plate in <del style="font-weight: bold; text-decoration: none;">selach— ians </del>and the chick comes to the conclusion, “If, then, as I have shown, the mesoderm is continuous around the anterior end of the notochord and the premandibular somites are formed by the lateral growth of a single, medial pre-axial mesodermal mass, it follows that we have to do here with a line of somites which is continuous around the anterior end of the notochord.”</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Adelmann (’22) from a study of the prechordal plate in <ins style="font-weight: bold; text-decoration: none;">selachians </ins>and the chick comes to the conclusion, “If, then, as I have shown, the mesoderm is continuous around the anterior end of the notochord and the premandibular somites are formed by the lateral growth of a single, medial pre-axial mesodermal mass, it follows that we have to do here with a line of somites which is continuous around the anterior end of the notochord.”</div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">fig</del>. 1 Two diagrams of the arrangements of the functional columns in the anterior portion of the neural plate and tube. Based on the work of Kingsbury and the discussion in the present paper.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">'''Fig</ins>. 1<ins style="font-weight: bold; text-decoration: none;">''' </ins>Two diagrams of the arrangements of the functional columns in the anterior portion of the neural plate and tube. Based on the work of Kingsbury and the discussion in the present paper.</div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>1 In a recent study of Arnblystoma embryos Burr (’22) has come to the conclusion that: “Between the fovea isthrni and the preoptic recess the midventral portion of the neural plate is occupied by the continuity of the lateral basal laminae. Between the preoptic recess and the lamina terminalis the mid—ventral portion of the neural plate is occupied by the terminal ridge, the continuity of the lateral alar plates.”</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* </ins>1 In a recent study of Arnblystoma embryos Burr (’22) has come to the conclusion that: “Between the fovea isthrni and the preoptic recess the midventral portion of the neural plate is occupied by the continuity of the lateral basal laminae. Between the preoptic recess and the lamina terminalis the mid—ventral portion of the neural plate is occupied by the terminal ridge, the continuity of the lateral alar plates.”</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>In higher vertebrates important relations are set up between the olfactory centers and the highly specialized correlating centers of the somatic receptive systems, situated in the telencephalon. These relations are already foreshadowed in some of the most active fishes (selachians) by the interchange of fibers between the lateral olfactory area and the anlagen of the lentiform nucleus and pallium respectively. As a result of the development of these olfacto-somatic correlations the olfactory organ changes its mode of functioning. Primitively it gave rise to reflex responses having to do directly with feeding or respiration. In higher forms the olfactory impressions may give rise to such reflex actions, but to an increasing degree such immediate responses are inhibited and the impressions are correlated with those received from the organs of touch, temperature, vision, and hearing to form a whole which we call a percept of the situation or environment at the moment. In this new integration of receptive systems in higher vertebrates brought about chiefly through the evolution of the general pallium, the relationship of the olfactory organ with the somatic receptive and correlating systems comes to be more extensive, if not more intimate, than its relation with the visceral systems. The differentiation of the pyriform lobe and of the newer parts of the amygdaloid complex as a result of this olfacto—somatic relationship has been discussed in the previous section (p. 464 ff.).</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>In higher vertebrates important relations are set up between the olfactory centers and the highly specialized correlating centers of the somatic receptive systems, situated in the telencephalon. These relations are already foreshadowed in some of the most active fishes (selachians) by the interchange of fibers between the lateral olfactory area and the anlagen of the lentiform nucleus and pallium respectively. As a result of the development of these olfacto-somatic correlations the olfactory organ changes its mode of functioning. Primitively it gave rise to reflex responses having to do directly with feeding or respiration. In higher forms the olfactory impressions may give rise to such reflex actions, but to an increasing degree such immediate responses are inhibited and the impressions are correlated with those received from the organs of touch, temperature, vision, and hearing to form a whole which we call a percept of the situation or environment at the moment. In this new integration of receptive systems in higher vertebrates brought about chiefly through the evolution of the general pallium, the relationship of the olfactory organ with the somatic receptive and correlating systems comes to be more extensive, if not more intimate, than its relation with the visceral systems. The differentiation of the pyriform lobe and of the newer parts of the amygdaloid complex as a result of this olfacto—somatic relationship has been discussed in the previous section (p. 464 ff.).</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;"></del></div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==B. Form Changes in the Evolution of the Hemispheres==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==B. Form Changes in the Evolution of the Hemispheres==</div></td></tr>
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Z8600021
https://embryology.med.unsw.edu.au/embryology/index.php?title=Paper_-_Further_contributions_to_the_study_of_the_evolution_of_the_forebrain_5&diff=269878&oldid=prev
Z8600021 at 02:48, 4 February 2017
2017-02-04T02:48:52Z
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Z8600021
https://embryology.med.unsw.edu.au/embryology/index.php?title=Paper_-_Further_contributions_to_the_study_of_the_evolution_of_the_forebrain_5&diff=269876&oldid=prev
Z8600021: /* Extent or degree of evagination */
2017-02-04T02:47:27Z
<p><span dir="auto"><span class="autocomment">Extent or degree of evagination</span></span></p>
<a href="https://embryology.med.unsw.edu.au/embryology/index.php?title=Paper_-_Further_contributions_to_the_study_of_the_evolution_of_the_forebrain_5&diff=269876&oldid=269874">Show changes</a>
Z8600021
https://embryology.med.unsw.edu.au/embryology/index.php?title=Paper_-_Further_contributions_to_the_study_of_the_evolution_of_the_forebrain_5&diff=269874&oldid=prev
Z8600021 at 02:44, 4 February 2017
2017-02-04T02:44:07Z
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<table style="background-color: #fff; color: #202122;" data-mw="interface">
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 13:44, 4 February 2017</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>{{Historic Disclaimer}}</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>{{Historic Disclaimer}}</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>=Further Contributions To The Study Of The Evolution Of The Forebrain<del style="font-weight: bold; text-decoration: none;">=</del></div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>=Further Contributions To The Study Of The Evolution Of The Forebrain V. Survey Of Forebrain Morphology<ins style="font-weight: bold; text-decoration: none;">=</ins></div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>V. Survey Of Forebrain Morphology</div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>J. B. Johnston</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>J. B. Johnston</div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>In this section references are made to the description and figures contained in sections I to IV pub‘.ished in this Journal for August, 1923.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>In this section references are made to the description and figures contained in sections I to IV pub‘.ished in this Journal for August, 1923.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>A. <del style="font-weight: bold; text-decoration: none;">GENERAL CONSIDERATIONS</del></div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">==</ins>A. <ins style="font-weight: bold; text-decoration: none;">General Considerations==</ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>B. <del style="font-weight: bold; text-decoration: none;">FORM CHANGES IN THE EVOLUTION OF THE HEMISPHERES</del></div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">==</ins>B. <ins style="font-weight: bold; text-decoration: none;">Form Changes in the Evolution of the Hemispheres==</ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Effect of hypertrophy of the visceral receptive column</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">===</ins>Effect of hypertrophy of the visceral receptive column<ins style="font-weight: bold; text-decoration: none;">===</ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>In the medulla oblongata of fishes the visceral receptive column is an elongated ridge projecting from the lateral Wall into the ventricle. In cyclostomes and selachians this is a rather slender ridge without great enlargement in any part. It is usually largest at about the level of the first roots of the vagus nerve. In some ganoids and teleosts this ridge is greatly enlarged, bulging out intogthe ventricle and pushing up dorsally until in many cases it thrusts the somatic receptive column to the side. Those changes are especially noticeable in the anterior part of the lobe related to the facial nerve. Those fishes in which this lobe serves chiefly general visceral functions have the vagal portion of the lobe largest, while those fishes in which the taste buds are very numerous have the facial lobe larger than the vagal. In extreme cases the facial lobes not only push dorsally as mentioned, but meet and fuse across the ventricle in the median plane. Some of these conditions are illustrated in previous papers (<del style="font-weight: bold; text-decoration: none;">’O6</del>, ’11 b).</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>In the medulla oblongata of fishes the visceral receptive column is an elongated ridge projecting from the lateral Wall into the ventricle. In cyclostomes and selachians this is a rather slender ridge without great enlargement in any part. It is usually largest at about the level of the first roots of the vagus nerve. In some ganoids and teleosts this ridge is greatly enlarged, bulging out intogthe ventricle and pushing up dorsally until in many cases it thrusts the somatic receptive column to the side. Those changes are especially noticeable in the anterior part of the lobe related to the facial nerve. Those fishes in which this lobe serves chiefly general visceral functions have the vagal portion of the lobe largest, while those fishes in which the taste buds are very numerous have the facial lobe larger than the vagal. In extreme cases the facial lobes not only push dorsally as mentioned, but meet and fuse across the ventricle in the median plane. Some of these conditions are illustrated in previous papers (<ins style="font-weight: bold; text-decoration: none;">’06</ins>, ’11 b).</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>fig. 3 On the left side the section touches the caudal surface of the olfactory bulb. The thick brain wall to which the bulb is attached probably includes parts of the lateral olfactory area and general pallium.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>fig. 3 On the left side the section touches the caudal surface of the olfactory bulb. The thick brain wall to which the bulb is attached probably includes parts of the lateral olfactory area and general pallium.</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">===</ins>Extent or degree of evagination<ins style="font-weight: bold; text-decoration: none;">===</ins></div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td colspan="2" class="diff-side-added"></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>As already noticed, in cyclostomes the bulb and part of the olfactory centers are evaginated, while the primordium hippocampi remains in the telencephalon medium. In Chimaera the evagination is somewhat greater. In ganoids and teleosts eversion becomes the dominant feature, while in amphibia, with the reduction of the gustatory apparatus, the eversion is subordinated to an evagination parallel with that in dipnoans and reptiles. In selachians most of the olfactory central mechanism is evaginated, but the telencephalon medium retains a slender continuation of the primordium hippocampi. (figs. 2, 3) and has a large part of the somatic column. The latter is destined to form the lentiform nucleus. Holmgren has not recognized this ‘somatic area’ in selachians, mistaking it for “part of an unusually</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>As already noticed, in cyclostomes the bulb and part of the olfactory centers are evaginated, while the primordium hippocampi remains in the telencephalon medium. In Chimaera the evagination is somewhat greater. In ganoids and teleosts eversion becomes the dominant feature, while in amphibia, with the reduction of the gustatory apparatus, the eversion is subordinated to an evagination parallel with that in dipnoans and reptiles. In selachians most of the olfactory central mechanism is evaginated, but the telencephalon medium retains a slender continuation of the primordium hippocampi. (figs. 2, 3) and has a large part of the somatic column. The latter is destined to form the lentiform nucleus. Holmgren has not recognized this ‘somatic area’ in selachians, mistaking it for “part of an unusually</div></td></tr>
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Z8600021
https://embryology.med.unsw.edu.au/embryology/index.php?title=Paper_-_Further_contributions_to_the_study_of_the_evolution_of_the_forebrain_5&diff=269872&oldid=prev
Z8600021 at 02:41, 4 February 2017
2017-02-04T02:41:21Z
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Z8600021
https://embryology.med.unsw.edu.au/embryology/index.php?title=Paper_-_Further_contributions_to_the_study_of_the_evolution_of_the_forebrain_5&diff=269870&oldid=prev
Z8600021 at 02:40, 4 February 2017
2017-02-04T02:40:45Z
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 13:40, 4 February 2017</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>{{Historic Disclaimer}}</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>{{Historic Disclaimer}}</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">AUTHOR'S ABSTRACT or 1315 PAPER xssuma 8! mm BIBLIOGRAPHIC aamvrcn, NOVEMBER 26</del></div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">=</ins>Further Contributions To The Study Of The Evolution Of The Forebrain<ins style="font-weight: bold; text-decoration: none;">=</ins></div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td colspan="2" class="diff-side-added"></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">[[Paper - Further contributions to the study of the evolution of the forebrain V. survey of forebrain morphology|Further contributions to the study of the evolution of the forebrain]]. (1923)</del></div></td><td colspan="2" class="diff-side-added"></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>V. Survey Of Forebrain Morphology</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>V. Survey Of Forebrain Morphology</div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>J. B. <del style="font-weight: bold; text-decoration: none;">JOHNSTON</del></div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>J. B. <ins style="font-weight: bold; text-decoration: none;">Johnston</ins></div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Anatomical Laboratory, University of Minnesota</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Anatomical Laboratory, University of Minnesota</div></td></tr>
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<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">THIRTY</del>-<del style="font-weight: bold; text-decoration: none;">TWO fiGURES</del></div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">Thirty</ins>-<ins style="font-weight: bold; text-decoration: none;">Two Figures</ins></div></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>In this section references are made to the description and figures contained in sections I to IV pub‘.ished in this Journal for</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>In this section references are made to the description and figures contained in sections I to IV pub‘.ished in this Journal for August, 1923.</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>August, 1923.</div></td><td colspan="2" class="diff-side-added"></td></tr>
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Z8600021
https://embryology.med.unsw.edu.au/embryology/index.php?title=Paper_-_Further_contributions_to_the_study_of_the_evolution_of_the_forebrain_5&diff=269868&oldid=prev
Z8600021 at 02:40, 4 February 2017
2017-02-04T02:40:01Z
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<a href="https://embryology.med.unsw.edu.au/embryology/index.php?title=Paper_-_Further_contributions_to_the_study_of_the_evolution_of_the_forebrain_5&diff=269868&oldid=269866">Show changes</a>
Z8600021
https://embryology.med.unsw.edu.au/embryology/index.php?title=Paper_-_Further_contributions_to_the_study_of_the_evolution_of_the_forebrain_5&diff=269866&oldid=prev
Z8600021: Created page with "{{Header}} {| class="wikitable mw-collapsible mw-collapsed" ! Online Editor |- | left This historic 1923 paper by Johnston describes develop..."
2017-02-04T02:28:41Z
<p>Created page with "{{Header}} {| class="wikitable mw-collapsible mw-collapsed" ! Online Editor |- | <a href="/embryology/index.php?title=File:Mark_Hill.jpg" title="File:Mark Hill.jpg">90px|left</a> This historic 1923 paper by Johnston describes develop..."</p>
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| [[File:Mark_Hill.jpg|90px|left]] This historic 1923 paper by Johnston describes development of the forebrain in many different species, including human. <br />
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See also his earlier paper: {{Ref-Johnston1909}}<br />
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Our understanding of forebrain development has improved significantly over the last 100 years, some current research looks at early molecular patterning mechanisms as well as the development of connections between different regions.<br />
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See the links below for the current notes pages.<br />
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[[Category:Historic Embryology]][[Category:Neural]][[Category:1920's]][[Category:Draft]]</div>
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