File:Stage22 HPA2L.jpg
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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.
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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
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 15:22, 10 August 2009 | | 603 × 399 (82 KB) | MarkHill (talk | contribs) | Original File name: HUMHPA2L.GIF |
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