File:Stage22 HPA2L.jpg: Difference between revisions

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* Small region from entire cross-section of the [[:Image:Stage22_HPA1L.jpg|stage 22 embryo head]] shown in high power.
* Small region from entire cross-section of the [[:Image:Stage22_HPA1L.jpg|stage 22 embryo head]] shown in high power.


===Cortex Development===
* Ventricular layer (stem cells) proliferate.
** mitosis
* Differentiating cells migrate away from ventricular layer.
** migrate along radial glial cells.
* Migrating cells stop at the region where the cortex will form.
* Cells are layered from the inside outwards.


Note
* all layers between ventricular and developing cortex are only developmental structures.
* Neurons are formed first, glia are formed later.
* Adult - ventricular layer lines the ventricles and appears to still contain some neural stem cells.
:'''Links:''' [[Neural System Development]] | [[Stem Cells]]


[[Category:Human Embryo]] [[Category:Carnegie Stage]] [[Category:Week 8]] [[Category:Ectoderm]] [[Category:Neural]]
[[Category:Human Embryo]] [[Category:Carnegie Stage]] [[Category:Week 8]] [[Category:Ectoderm]] [[Category:Neural]]

Revision as of 09:36, 20 May 2013

Human Embryo Carnegie stage 22

  • Section through the head/brain region of the developing cortex.
  • Small region from entire cross-section of the stage 22 embryo head shown in high power.

Cortex Development

  • Ventricular layer (stem cells) proliferate.
    • mitosis
  • Differentiating cells migrate away from ventricular layer.
    • migrate along radial glial cells.
  • Migrating cells stop at the region where the cortex will form.
  • Cells are layered from the inside outwards.

Note

  • all layers between ventricular and developing cortex are only developmental structures.
  • Neurons are formed first, glia are formed later.
  • Adult - ventricular layer lines the ventricles and appears to still contain some neural stem cells.


Links: Neural System Development | Stem Cells

File history

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Date/TimeThumbnailDimensionsUserComment
current16:22, 10 August 2009Thumbnail for version as of 16:22, 10 August 2009603 × 399 (82 KB)MarkHill (talk | contribs) Original File name: HUMHPA2L.GIF