Category:Carnegie Embryo 317 - Revision history

Z8600021 at 07:43, 12 November 2017

2017-11-12T07:43:12Z

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	{{Ref-Lisser1911}}		{{Ref-Lisser1911}}

			{{Ref-Mall1912}}

	==Larynx==		==Larynx==

Z8600021 at 00:48, 10 November 2017

2017-11-10T00:48:33Z

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	===The Cartilages===		===The Cartilages===

	The thyreoid cartilage still consists purely of precartilage, - condensed mesenchyma, and has not changed greatly in appearance		The thyreoid cartilage still consists purely of precartilage, - condensed mesenchyma, and has not changed greatly in appearance
	from the one in the 10.5 mm. human embryo. However, rudiments of a superior cornu and inferior cornu are just discernable,		from the one in the 10.5 mm. human embryo. However, rudiments of a superior cornu and inferior cornu are just discernable,
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	lateral portions of the cricoid, and between them is ample room for		lateral portions of the cricoid, and between them is ample room for
	the lateral larynx muscles; the circothyreoideus, circoarytaenoideus lateralis, and perhaps thyreoarytaenoideus.		the lateral larynx muscles; the circothyreoideus, circoarytaenoideus lateralis, and perhaps thyreoarytaenoideus.


	The cricoid cartilage consists likewise of condensed mesenchyma but is somewhat ahead of the thyreoid in assuming definite shape; certainly the intensity of the condensation is greater, as determined by deeper staining and clearer outline; the ventral arcus maintains its lead over the dorsal and lateral portions although the latter show definite increase in the size of the condensed masses and assume a clearer outline. Figs. 4 and 5, show two sections		The cricoid cartilage consists likewise of condensed mesenchyma but is somewhat ahead of the thyreoid in assuming definite shape; certainly the intensity of the condensation is greater, as determined by deeper staining and clearer outline; the ventral arcus maintains its lead over the dorsal and lateral portions although the latter show definite increase in the size of the condensed masses and assume a clearer outline. Figs. 4 and 5, show two sections
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	and slit-like, so that the circular, ring-like appearance of the cricoid is not yet established. The sides seem compressed more or		and slit-like, so that the circular, ring-like appearance of the cricoid is not yet established. The sides seem compressed more or
	less one upon the other.		less one upon the other.


	The artaenoid masses, (fig. 4), make their appearance at this		The artaenoid masses, (fig. 4), make their appearance at this
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	the cricoid and thyreoid show a predominance of chondrification,		the cricoid and thyreoid show a predominance of chondrification,
	the arytaenoids and epiglottis are still represented only by condensed mesenchyma.		the arytaenoids and epiglottis are still represented only by condensed mesenchyma.


	The epiglottis. The epiglottis is shown in fig. 3 ; it is situated at a lower level than in the adult.		The epiglottis. The epiglottis is shown in fig. 3 ; it is situated at a lower level than in the adult.


	There is a crowding together of laryngeal structures at this		There is a crowding together of laryngeal structures at this
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	partial, have already occurred by the 20 mm. stage, as seen in fig.		partial, have already occurred by the 20 mm. stage, as seen in fig.
	38 of the model and illustrate the tendency, which is fulfilled more markedly later.		38 of the model and illustrate the tendency, which is fulfilled more markedly later.


	The hyoid hone and styloid process are composed of condensed mesenchyma and are very clearly outlined. Fig. 3 shows this. The greater cornu is developing rapidly and has attained large proportions.		The hyoid hone and styloid process are composed of condensed mesenchyma and are very clearly outlined. Fig. 3 shows this. The greater cornu is developing rapidly and has attained large proportions.
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	The figs. 4 and 5 which are intended to illustrate, among other things, some of the musculature of the larynx, may give a wrong impression, which possibility therefore, I hasten to avoid. There is by no means the fibrillation in these rimscles, as shown in fig. 6. The muscles, with the exception of the circoartyaenoideus posterior, which is faithfully drawn - are merely condensed mesenchyme, with the barest suggestions of fibrillation, and the character given them in the drawings are merely for the sake of clarity.		The figs. 4 and 5 which are intended to illustrate, among other things, some of the musculature of the larynx, may give a wrong impression, which possibility therefore, I hasten to avoid. There is by no means the fibrillation in these rimscles, as shown in fig. 6. The muscles, with the exception of the circoartyaenoideus posterior, which is faithfully drawn - are merely condensed mesenchyme, with the barest suggestions of fibrillation, and the character given them in the drawings are merely for the sake of clarity.


	M. cricoarytaenoideus posterior is very well developed, as shown in fig. 8, of large size, and well advanced to fairly complete fibrillation. The muscle is somewhat more laterally situated than in the adult, but otherwise conforms closely to the later stages. It is plentifully innervated by the recurrent laryngeal nerve.		M. cricoarytaenoideus posterior is very well developed, as shown in fig. 8, of large size, and well advanced to fairly complete fibrillation. The muscle is somewhat more laterally situated than in the adult, but otherwise conforms closely to the later stages. It is plentifully innervated by the recurrent laryngeal nerve.


	M. cricoarytaenoideus lateralis (fig. 4) though not nearly so precisely outlined, this muscle mass, nevertheless, assumes considerable proportions at this stage. It is difficult, as it was in the case of the 10.5 mm. embryo, to decide whether the premuscle tissue represents only the cricoarytaenoideus lateralis, or whether it also includes what is to become the thyreoarytaenoideus m. No fibers originating from the mesial surface of the lateral portions of the thyreoid cartilage were found, not even a slight trend of the		M. cricoarytaenoideus lateralis (fig. 4) though not nearly so precisely outlined, this muscle mass, nevertheless, assumes considerable proportions at this stage. It is difficult, as it was in the case of the 10.5 mm. embryo, to decide whether the premuscle tissue represents only the cricoarytaenoideus lateralis, or whether it also includes what is to become the thyreoarytaenoideus m. No fibers originating from the mesial surface of the lateral portions of the thyreoid cartilage were found, not even a slight trend of the
	condensed mesenchyma. So that the muscle may not appear at all till later in development. The thyreoepyglotticus and aryepiglotticus are both absent.		condensed mesenchyma. So that the muscle may not appear at all till later in development. The thyreoepyglotticus and aryepiglotticus are both absent.


	The inter arty aenoideus (fig. 6) has made its appearance, but is partly attached to the insertion fibers of the circoarytaenoideus posterior. It is fibrillated.		The inter arty aenoideus (fig. 6) has made its appearance, but is partly attached to the insertion fibers of the circoarytaenoideus posterior. It is fibrillated.


	The cricothyreoideus muscle (fig. 5) can be made out at this time, sending its fibers from the ventrolateral portion of the cricoid to the mesial surface of the thyreoid. It cannot be entirely separated from the cricoarytaenoideus lateralis mass, but its innervation by the superior laryngeal nerve helps in the identification.		The cricothyreoideus muscle (fig. 5) can be made out at this time, sending its fibers from the ventrolateral portion of the cricoid to the mesial surface of the thyreoid. It cannot be entirely separated from the cricoarytaenoideus lateralis mass, but its innervation by the superior laryngeal nerve helps in the identification.
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	The N. laryngeus superior (fig. 4) and inferior (fig. 6) can be followed perfectly in these sections, from the point where they leave the vagus, to their ultimate endings in the various muscles. No reconstruction was made to prove positively an anastomosis between the two, although a study of the sections suggested this strongly. The innervations of the various muscle masses were definitely seen.		The N. laryngeus superior (fig. 4) and inferior (fig. 6) can be followed perfectly in these sections, from the point where they leave the vagus, to their ultimate endings in the various muscles. No reconstruction was made to prove positively an anastomosis between the two, although a study of the sections suggested this strongly. The innervations of the various muscle masses were definitely seen.

	~~<gallery>~~
	File:Lisser1911 fig04.jpg\|Fig 4 Frontal section of human [[:Category:Carnegie Embryo 317\|'''Embryo no. 317''']] (12.5 mm.) to show superior laryngeal nerve, sup. /ary., superior laryngeal nerve; car. a., carotid artery.
	~~File:Lisser1911 fig05.jpg\|Fig 5 Frontal section of human [[:Category:Carnegie Embryo 317\|'''Embryo no. 317''']] (12.5 mm.) to show M. crico-thyreoideus and arytaenoid masses.~~
	File:Lisser1911 fig06.jpg\|Fig 6 Frontal section of human [[:Category:Carnegie Embryo 317\|'''Embryo no. 317''']] (12.5 mm.) to show M. cricoary taenoideus posterior, interarytaenoideus and nerve recurrent.
	~~</gallery>~~

Z8600021 at 00:47, 10 November 2017

2017-11-10T00:47:55Z

← Older revision		Revision as of 11:47, 10 November 2017
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	[[Category:Carnegie Stage 18]]		[[Category:Carnegie Stage 18]]
	[[Category:Week 7]][[Category:~~1800~~'s]]		[[Category:Week 7]][[Category:1900's]]

Z8600021 at 23:53, 9 November 2017

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-This page includes pages and images that relate to the Carnegie Collection Embryo No.317. This embryo was classified as [[Carnegie stage 18]]  occurring during [[Week 7]].
+This {{Embryology}} category includes pages and images that relate to the Carnegie Collection Embryo No. {{CE317}} . This embryo was classified as [[Carnegie stage 18]]  occurring during [[Week 7]].
+<br>
 {| class="wikitable"
 |-
 ! Serial No. !! Size (mm) !! Grade !! Fixative !! Embedding Medium !! Plane !! Thinness (µm) !! Stain !! Semi. ducts !! P.-M. duct (mm) !! Year !! Notes
 |-
-| 317  || E., 16.0  || Good  || Formol  || P  || Cor.  || 20  || H. &or.G.  || 2 || 0.7  || 1905  || Middle third
+| {{CE317}}  || E., 16.0  || Good  || Formol  || P  || Cor.  || 20  || H. &or.G.  || 2 || 0.7  || 1905  || Middle third
 |}
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 ===References===
 {{Ref-Lisser1911}}
 {{Carnegie numbered embryo links}}

Z8600021 at 12:32, 15 Haziran 2016

2016-06-15T12:32:23Z

← Older revision		Revision as of 23:32, 15 Haziran 2016
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	This page includes pages and images that relate to the Carnegie Collection Embryo No.317. This embryo was classified as [[Carnegie stage 18]] occurring during [[Week 7]].		This page includes pages and images that relate to the Carnegie Collection Embryo No.317. This embryo was classified as [[Carnegie stage 18]] occurring during [[Week 7]].



	{\| class="wikitable"		{\| class="wikitable"
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	{{Carnegie Collection stage 18 table}}		{{Carnegie Collection stage 18 table}}

			===References===
			{{Ref-Lisser1911}}

	{{Carnegie numbered embryo links}}		{{Carnegie numbered embryo links}}

Z8600021 at 04:39, 12 Haziran 2016

2016-06-12T04:39:52Z

← Older revision		Revision as of 15:39, 12 Haziran 2016
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	This ~~{{Embryology}} category~~ includes pages and images that relate to the [[Carnegie ~~Collection~~]] ~~Embryo~~ No. 317.		This page includes pages and images that relate to the Carnegie Collection Embryo No.317. This embryo was classified as [[Carnegie stage 18]] occurring during [[Week 7]].



			{\| class="wikitable"
			\|-
			! Serial No. !! Size (mm) !! Grade !! Fixative !! Embedding Medium !! Plane !! Thinness (µm) !! Stain !! Semi. ducts !! P.-M. duct (mm) !! Year !! Notes
			\|-
			\| 317 \|\| E., 16.0 \|\| Good \|\| Formol \|\| P \|\| Cor. \|\| 20 \|\| H. &or.G. \|\| 2 \|\| 0.7 \|\| 1905 \|\| Middle third
			\|}

			{{Carnegie Collection stage 18 table}}


			{{Carnegie numbered embryo links}}

			[[Category:Carnegie Stage 18]]
			[[Category:Week 7]][[Category:1800's]]

Z8600021: Created page with "This {{Embryology}} category includes pages and images that relate to the Carnegie Collection Embryo No. 317."

2016-01-19T09:49:54Z

Created page with "This {{Embryology}} category includes pages and images that relate to the Carnegie Collection Embryo No. 317."

New page

This {{Embryology}} category includes pages and images that relate to the [[Carnegie Collection]] Embryo No. 317.