ANAT2341 Lab 10 - Late Embryo - Revision history

Z8600021 at 22:04, 14 October 2015

2015-10-14T22:04:30Z

← Older revision		Revision as of 08:04, 15 October 2015
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	==Vision ~~- Embryonic Week~~==		==Week 6 to 8 - Vision==
	(data based upon<ref><pubmed>7364662</pubmed></ref> and other sources).		(data based upon<ref><pubmed>7364662</pubmed></ref> and other sources).

Z8600021 at 22:03, 14 October 2015

2015-10-14T22:03:52Z

← Older revision		Revision as of 08:03, 15 October 2015
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	{{ANAT2341Lab10}}		{{ANAT2341Lab10}}


	==Vision - Embryonic Week==		==Vision - Embryonic Week==
	(data based upon<ref><pubmed>7364662</pubmed></ref> and other sources).		(data based upon<ref><pubmed>7364662</pubmed></ref> and other sources).

	* Week 5 - [[Carnegie_stage_14\|Stage 14]] - (about 32 days) the lens placode is indented by the lens pit, cup-shaped and still communicates with the surface by a narrowing pore. [[Carnegie_stage_15\|Stage 15]] - (about 33 days) the lens pit is closed. The lens vesicle and optic cup lie close to the surface ectoderm and appear to press against the surface.
	* Week 6 - [[Carnegie_stage_16\|Stage 16]] - (37 days) Growth of the lens body results in a D-shaped lens cavity. Perilental blood vessels (tunica vasculosa lentis) are visible. Prior to the development of the eyelids, one small sulcus or groove forms above the eye (eyelid groove) and another below it.		* Week 6 - [[Carnegie_stage_16\|Stage 16]] - (37 days) Growth of the lens body results in a D-shaped lens cavity. Perilental blood vessels (tunica vasculosa lentis) are visible. Prior to the development of the eyelids, one small sulcus or groove forms above the eye (eyelid groove) and another below it.
	* Week 6 to 7 - [[Carnegie_stage_17\|Stages 17 - 19]] - Retinal pigment is visible and the retinal fissure is largely closed. Eyelids grooves deepen, eyelid folds develop, first below, and then above, the eye.		* Week 6 to 7 - [[Carnegie_stage_17\|Stages 17 - 19]] - Retinal pigment is visible and the retinal fissure is largely closed. Eyelids grooves deepen, eyelid folds develop, first below, and then above, the eye.
	* Week 7 - [[Carnegie_stage_18\|Stages 18]] - Mesenchyme invades the region between the lens epithelium and the surface ectoderm.		* Week 7 - [[Carnegie_stage_18\|Stages 18]] - Mesenchyme invades the region between the lens epithelium and the surface ectoderm.
	* Week 7 to 8 - [[Carnegie_stage_19\|Stages 19 - 22]] - the eyelid folds develop into the eyelids and cover more of the eye as the palpebral fissure takes shape. ~~Stage 19 the~~ upper and the lower eyelids meet at the outer canthus ~~(palpebral commissure, corner of the eye where the upper and lower eyelids meet)~~.		* Week 7 to 8 - [[Carnegie_stage_19\|Stages 19 - 22]] - the eyelid folds develop into the eyelids and cover more of the eye as the palpebral fissure takes shape. The upper and the lower eyelids meet at the outer canthus in Stage 19.
	* Week 8 - [[Carnegie_stage_20\|Stage 20]] - The lens cavity is lost and a lens suture begins to form. The inner canthus is established. [[Carnegie_stage_23\|Stage 23]] - The retina comprises the pigmented layer, external limiting membrane, proliferative zone, external neuroblastic layer, transient fiber layer, internal neuroblastic layer, nerve fiber layer, and internal limiting membrane. Eyelids closure is complete.		* Week 8 - [[Carnegie_stage_20\|Stage 20]] - The lens cavity is lost and a lens suture begins to form. The inner canthus is established. [[Carnegie_stage_23\|Stage 23]] - The retina comprises the pigmented layer, external limiting membrane, proliferative zone, external neuroblastic layer, transient fiber layer, internal neuroblastic layer, nerve fiber layer, and internal limiting membrane. Eyelids closure is complete.



	==Week 8==		==Week 8==

	~~===Vision===~~

	{\| class="wikitable" border="1"		{\| class="wikitable" border="1"

Z8600021 at 22:00, 14 October 2015

2015-10-14T22:00:13Z

← Older revision		Revision as of 08:00, 15 October 2015
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	{{ANAT2341Lab10}}		{{ANAT2341Lab10}}

			==Vision - Embryonic Week==
			(data based upon<ref><pubmed>7364662</pubmed></ref> and other sources).

			* Week 5 - [[Carnegie_stage_14\|Stage 14]] - (about 32 days) the lens placode is indented by the lens pit, cup-shaped and still communicates with the surface by a narrowing pore. [[Carnegie_stage_15\|Stage 15]] - (about 33 days) the lens pit is closed. The lens vesicle and optic cup lie close to the surface ectoderm and appear to press against the surface.
			* Week 6 - [[Carnegie_stage_16\|Stage 16]] - (37 days) Growth of the lens body results in a D-shaped lens cavity. Perilental blood vessels (tunica vasculosa lentis) are visible. Prior to the development of the eyelids, one small sulcus or groove forms above the eye (eyelid groove) and another below it.
			* Week 6 to 7 - [[Carnegie_stage_17\|Stages 17 - 19]] - Retinal pigment is visible and the retinal fissure is largely closed. Eyelids grooves deepen, eyelid folds develop, first below, and then above, the eye.
			* Week 7 - [[Carnegie_stage_18\|Stages 18]] - Mesenchyme invades the region between the lens epithelium and the surface ectoderm.
			* Week 7 to 8 - [[Carnegie_stage_19\|Stages 19 - 22]] - the eyelid folds develop into the eyelids and cover more of the eye as the palpebral fissure takes shape. Stage 19 the upper and the lower eyelids meet at the outer canthus (palpebral commissure, corner of the eye where the upper and lower eyelids meet).
			* Week 8 - [[Carnegie_stage_20\|Stage 20]] - The lens cavity is lost and a lens suture begins to form. The inner canthus is established. [[Carnegie_stage_23\|Stage 23]] - The retina comprises the pigmented layer, external limiting membrane, proliferative zone, external neuroblastic layer, transient fiber layer, internal neuroblastic layer, nerve fiber layer, and internal limiting membrane. Eyelids closure is complete.



	==Week 8==		==Week 8==

Z8600021: /* Embryonic External Ear */

2012-10-02T23:42:18Z

Embryonic External Ear

← Older revision		Revision as of 09:42, 3 October 2012
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	[[File:External_ear_stages-14-23-adult.jpg\|600px]]		[[File:External_ear_stages-14-23-adult.jpg\|600px]]
			{\|
	[[File:Human embryo head week 6 to 8.jpg\|400px]]		\| [[File:Human embryo head week 6 to 8.jpg\|400px]]
			\| '''Movement of the external ear in human embryo''' (week 6 to 8)<ref name="PMID22296782"><pubmed>22296782</pubmed>\| [http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3286420 PMC3286420] \| [http://www.head-face-med.com/content/8/1/2 Head Face Med.]</ref>
	'''Movement of the external ear in human embryo''' (week 6 to 8)<ref name="PMID22296782"><pubmed>22296782</pubmed>\| [http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3286420 PMC3286420] \| [http://www.head-face-med.com/content/8/1/2 Head Face Med.]</ref>

	:"In all, 171 samples between Carnegie stage (CS) 17 and CS 23 were selected from MR image datasets of human embryos obtained from the Kyoto Collection of Human Embryos. The three-dimensional absolute position of 13 representative anatomical landmarks, including external and internal ears, from MRI data was traced to evaluate the movement between the different stages with identical magnification. Two different sets of reference axes were selected for evaluation and comparison of the movements. ...The results indicate that movement of all anatomical landmarks, including external and internal ears, can be explained by differential growth. Also, when the external ear is recognized as one of the facial landmarks and having a relative position to other landmarks such as the eyes and mouth, the external ears seem to move cranially."		:"In all, 171 samples between Carnegie stage (CS) 17 and CS 23 were selected from MR image datasets of human embryos obtained from the Kyoto Collection of Human Embryos. The three-dimensional absolute position of 13 representative anatomical landmarks, including external and internal ears, from MRI data was traced to evaluate the movement between the different stages with identical magnification. Two different sets of reference axes were selected for evaluation and comparison of the movements. ...The results indicate that movement of all anatomical landmarks, including external and internal ears, can be explained by differential growth. Also, when the external ear is recognized as one of the facial landmarks and having a relative position to other landmarks such as the eyes and mouth, the external ears seem to move cranially."
			\|}

	==References==		==References==

Z8600021: /* Embryonic External Ear */

2012-10-02T23:41:43Z

Embryonic External Ear

← Older revision		Revision as of 09:41, 3 October 2012
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	===Embryonic External Ear===		===Embryonic External Ear===

	~~[[File:Human embryo head week 6 to 8.jpg\|400px]]~~

	'''Movement of the external ear in human embryo''' (week 6 to 8)<ref name="PMID22296782"><pubmed>22296782</pubmed>\| [http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3286420 PMC3286420] \| [http://www.head-face-med.com/content/8/1/2 Head Face Med.]</ref>

	Shown below are the changes in external ear development between week 5 to week 8. Development changes from a series of 6 hillocks on arch 1 and arch 2 (week 5) to a structure resembling the adult ear (week 8).		Shown below are the changes in external ear development between week 5 to week 8. Development changes from a series of 6 hillocks on arch 1 and arch 2 (week 5) to a structure resembling the adult ear (week 8).

Z8600021: /* Embryonic External Ear */

2012-10-02T23:41:13Z

Embryonic External Ear

← Older revision		Revision as of 09:41, 3 October 2012
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	[[File:External_ear_stages-14-23-adult.jpg\|600px]]		[[File:External_ear_stages-14-23-adult.jpg\|600px]]

			[[File:Human embryo head week 6 to 8.jpg\|400px]]

			'''Movement of the external ear in human embryo''' (week 6 to 8)<ref name="PMID22296782"><pubmed>22296782</pubmed>\| [http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3286420 PMC3286420] \| [http://www.head-face-med.com/content/8/1/2 Head Face Med.]</ref>

			:"In all, 171 samples between Carnegie stage (CS) 17 and CS 23 were selected from MR image datasets of human embryos obtained from the Kyoto Collection of Human Embryos. The three-dimensional absolute position of 13 representative anatomical landmarks, including external and internal ears, from MRI data was traced to evaluate the movement between the different stages with identical magnification. Two different sets of reference axes were selected for evaluation and comparison of the movements. ...The results indicate that movement of all anatomical landmarks, including external and internal ears, can be explained by differential growth. Also, when the external ear is recognized as one of the facial landmarks and having a relative position to other landmarks such as the eyes and mouth, the external ears seem to move cranially."

	==References==		==References==

Z8600021: /* Embryonic External Ear */

2012-10-02T23:40:06Z

Embryonic External Ear

← Older revision		Revision as of 09:40, 3 October 2012
Line 190:		Line 190:

	===Embryonic External Ear===		===Embryonic External Ear===

			[[File:Human embryo head week 6 to 8.jpg\|400px]]

			'''Movement of the external ear in human embryo''' (week 6 to 8)<ref name="PMID22296782"><pubmed>22296782</pubmed>\| [http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3286420 PMC3286420] \| [http://www.head-face-med.com/content/8/1/2 Head Face Med.]</ref>

	Shown below are the changes in external ear development between week 5 to week 8. Development changes from a series of 6 hillocks on arch 1 and arch 2 (week 5) to a structure resembling the adult ear (week 8).		Shown below are the changes in external ear development between week 5 to week 8. Development changes from a series of 6 hillocks on arch 1 and arch 2 (week 5) to a structure resembling the adult ear (week 8).

Z8600021: Created page with "{{ANAT2341Lab10}} ==Week 8== ===Vision=== {| class="wikitable" border="1" |+ '''Stage 22 (serial labeled images)''' ! Section ! Name..."

2012-10-02T04:42:21Z

Created page with "{{ANAT2341Lab10}} ==Week 8== ===Vision=== {| class="wikitable" border="1" |+ '''Stage 22 (serial labeled images)''' ! Section ! Name..."

New page

{{ANAT2341Lab10}}

==Week 8==

===Vision===

{| class="wikitable" border="1"
|+ '''[[Carnegie stage 22 - serial sections|Stage 22]] (serial labeled images)'''
! Section
! Name
! Description
|-
| [[File:Stage_22 image 055.jpg|200px]]
| [[:File:Stage_22 image 055.jpg|A6L]]
| '''Identify -''' Cornea. Anterior chamber. Lens. Vitreous body. Sensory retina. optic ventricle (artefact). Pigment epithelium.

Conjunctival sac. Primordium of lacrimal glands (near lateral fornix of conjunctival sac).

Interorbital ligament. Nose. upper eyelids.

|-

| [[File:Stage_22 image 056.jpg|200px]]
| [[:File:Stage_22 image 056.jpg|A7L]]
| '''Identify -''' Medial rectus muscle. Primordium of nasolacrimal ducts.

Upper eyelid (lateral). Lower eyelid (medial).
|-
| [[File:Stage_22 image 057.jpg|200px]]
| [[:File:Stage_22 image 057.jpg|B1L]]
| '''Identify -''' Optic nerve. Note extensive temporal region of retina.

Primordium of nasolacrimal ducts.
|-

| [[File:Stage_22 image 058.jpg|200px]]
| [[:File:Stage_22 image 058.jpg|B2L]]
| '''Identify -''' Medial and lateral rectus muscles. Pigment epithelium.

Note relationship of eye to nasal capsule, sphenoid cartilage and trigeminal ganglion.

Primordium of nasolacrimal ducts (cut obliquely).

|-

| [[File:Stage_22 image 059.jpg|200px]]
| [[:File:Stage_22 image 059.jpg|B3L]]
| '''Identify -''' On left course of maxillary division of trigeminal in relation to position of eye (superior to this level).
|-
|}

===Hearing and Balance===
:{{Template:Hearing Links}}
{| class="wikitable" border="1"
|+ '''[[Carnegie stage 22 - serial sections|Stage 22]] (serial labeled images)'''
! Section
! Name
! Description
|-
| [[File:Stage_22 image 059.jpg|200px]]
| [[:File:Stage_22 image 059.jpg|B3L]]
| '''Identify -''' Rhombic lip (developing cerebellum). IVth ventricle. Trigeminal ganglion. Adenohypophysis. Sphenoid cartilage.

|-

| [[File:Stage_22 image 060.jpg|200px]]
| [[:File:Stage_22 image 060.jpg|B4L]]
| '''Identify -''' Cochlear duct and temporal cartilage. Semicircular duct (ampulla on L). precartilage of auricle (pinna). malleus (medial, L). Incus (lateral, L).

|-

| [[File:Stage_22 image 061.jpg|200px]]
| [[:File:Stage_22 image 061.jpg|B5L]]
| '''Identify -''' Extemal auditory meatus. Auricle.

Incus (dorsal). Malleus (ventral). Tubotympanic recess (auditory rube). Tensor tympani m. (L). Utricle.

Semicircular ducts. Intemal auditory meatus (R), containing vestibular and spiral ganglia. Endolymphatic sac (L).

Note proximity of sac to choroid plexus of 4th ventricle.

|-

| [[File:Stage_22 image 062.jpg|200px]]
| [[:File:Stage_22 image 062.jpg|B6L]]
| '''Identify -''' External auditory meatus. Primordium of tympanic membrane (L).

Manubrium of malleus(L). Meckel's cartilage. Stapes (R). Auditory tube.

Basal turn of cochlea duct (L). Endolymphatic sac (R). Common crus (R). Junction of utricle and saccule (R).

|}

===Smell===

{| class="wikitable" border="1"
|+ '''[[Carnegie stage 22 - serial sections|Stage 22]] (serial labeled images)'''
! Section
! Name
! Description
|-
| [[File:Stage_22 image 054.jpg|200px]]
| [[:File:Stage_22 image 054.jpg|A5L]]
| '''Identify -''' Olfactory bulbs.
|-
| [[File:Stage_22 image 055.jpg|200px]]
| [[:File:Stage_22 image 055.jpg|A6L]]
| '''Identify -''' Interorbital ligament. nasal septum. primitive olfactory epithelium.
|-

| [[File:Stage_22 image 056.jpg|200px]]
| [[:File:Stage_22 image 056.jpg|A7L]]
| '''Identify -''' nasal capsule, nasal conchae, nasal septum, nasolacrimal duct.
|-
| [[File:Stage_22 image 057.jpg|200px]]
| [[:File:Stage_22 image 057.jpg|B1L]]
| '''Identify -''' nasal capsule, nasal conchae, nasal septum, nasolacrimal duct.
|-

| [[File:Stage_22 image 058.jpg|200px]]
| [[:File:Stage_22 image 058.jpg|B2L]]
| '''Identify -''' Vomeronasal organs (dark spots) beside nasal septum.

|-

| [[File:Stage_22 image 059.jpg|200px]]
| [[:File:Stage_22 image 059.jpg|B3L]]
| '''Identify -''' Nasolacrimal ducts
|-

| [[File:Stage_22 image 060.jpg|200px]]
| [[:File:Stage_22 image 060.jpg|B4L]]
| '''Identify -''' Tongue
|-

| [[File:Stage_22 image 061.jpg|200px]]
| [[:File:Stage_22 image 061.jpg|B5L]]
| '''Identify -''' Unfused palatal shelves either side of tongue. Section through mandible (top of image).
|}

===Vision and Hearing Selected Sections===

{|
|+'''[[Carnegie_stage_22_-_selected_serial_sections|Stage 22]]''' ''selected serial labeled images''
| [[File:Stage 22 image 150.jpg|120px]]
| [[File:Stage 22 image 151.jpg|120px]]
| [[File:Stage 22 image 152.jpg|120px]]
| [[File:Stage 22 image 153.jpg|120px]]
| [[File:Stage 22 image 154.jpg|120px]]
| [[File:Stage 22 image 155.jpg|120px]]
| [[File:Stage 22 image 156.jpg|120px]]
|-
| [[:File:Stage 22 image 150.jpg|A1 head and brain]]
| [[:File:Stage 22 image 151.jpg|A2 cortex]]
| [[:File:Stage 22 image 152.jpg|A3 eye]]
| [[:File:Stage 22 image 153.jpg|A4 optic nerve]]
| [[:File:Stage 22 image 154.jpg|A5 retina]]
| [[:File:Stage 22 image 155.jpg|A6 lens]]
| [[:File:Stage 22 image 156.jpg|A7 CN5 and endocrine]]
|-
| [[File:Stage 22 image 157.jpg|120px]]
| [[File:Stage 22 image 158.jpg|120px]]
| [[File:Stage 22 image 159.jpg|120px]]
| [[File:Stage 22 image 160.jpg|120px]]
| [[File:Stage 22 image 161.jpg|120px]]
| [[File:Stage 22 image 162.jpg|120px]]
| [[File:Stage 22 image 163.jpg|120px]]
|-
| [[:File:Stage 22 image 157.jpg|B1 CN5 trigeminal]]
| [[:File:Stage 22 image 158.jpg|B2 pituitary]]
| [[:File:Stage 22 image 159.jpg|B3 auditory]]
| [[:File:Stage 22 image 160.jpg|B4 choroid plexus]]
| [[:File:Stage 22 image 161.jpg|B5 membranous labyrinth]]
| [[:File:Stage 22 image 162.jpg|B6 inner ear]]
| [[:File:Stage 22 image 163.jpg|B7 neck]]
|}

===Hearing===
{|
| [[File:Stage_22_image_159.jpg|400px]]

[[File:Stage_22_image_159.jpg|120px]] [[:File:Stage 22 image 159.jpg|'''Selected Head Images''']]: [[:File:Stage_22_image_160.jpg|B4 - Choroid Plexus]] | [[:File:Stage_22_image_161.jpg|B5 - Cochlea]] | [[:File:Stage_22_image_162.jpg|B6 - Cochlea]]
|
* A pale cartilagenous region (that later ossifies) encloses the structuctures of the inner ear.
* Beside this region the middle ear bones are forming.
* On the righthand side of the head the external ear is visible.
* The lower half of the image shows the developing brainstem with a large ventricular space occupied in part by an extensive choroid plexus (manufacturer of cerebrospinal fluid).
|}

===Embryonic External Ear===
Shown below are the changes in external ear development between week 5 to week 8. Development changes from a series of 6 hillocks on arch 1 and arch 2 (week 5) to a structure resembling the adult ear (week 8).

[[File:External_ear_stages-14-23-adult.jpg|600px]]

==References==

<references/>

{{ANAT2341Lab10}}

{{Glossary}}
{{Footer}}