File:Stage 22 image 217.jpg
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Human Embryo Developing Cortex
|Human embryo, Week 8, Carnegie stage 22 section from the neural tube at the level of the developing cortex. Inset (upper right) shows section overview and approximate level of section (red line). Developing cerebrum layer thicknesses are shown in microns.
The thin outer layer called cortical plate will eventually form the adult brain cortex. The other underlying layers are part of the development process and will continue to supply cells to the cortex through fetal period, these layers will eventually be almost completely lost. Layers are named according to the nervous system revised terminology (1970)
Developing lateral ventricle is the cerebrospinal fluid (CSF) filled space within the cortical region of the brain. The inset image shows lying within the lateral ventricles, the choroid plexus the modified vascular structure that forms and secretes the CSF.
Developing meninges pia and sub-arachnoid layers can also be seen.
Low resolution image
|Neural Tube||Primary Vesicles||Secondary Vesicles||Adult Structures|
|week 3||week 4||week 5||adult|
|prosencephalon (forebrain)||telencephalon||Rhinencephalon, Amygdala, hippocampus, cerebrum (cortex), hypothalamus, pituitary | Basal Ganglia, lateral ventricles|
|diencephalon||epithalamus, thalamus, Subthalamus, pineal, posterior commissure, pretectum, third ventricle|
|mesencephalon (midbrain)||mesencephalon||tectum, Cerebral peduncle, cerebral aqueduct, pons|
|myelencephalon||medulla oblongata, isthmus|
|spinal cord, pyramidal decussation, central canal|
- Links: Image - cortex overview | Image - cortex layers | Image - high resolution version | Cerebrum Development | Meninges Development
Note this section image is vertically flipped compared with original serial section images.
|Selected Embryo Histology - Week 8 (Stage 22)|
|Links: Carnegie stage 22 | Week 8|
|Stage 22 Links: Week 8 | System Development | Lecture - Limb | Lecture - Head Development | Lecture - Sensory | Science Practical - Head | Science Practical - Sensory | Science Practical - Urogenital | Historic - Skull Development | Carnegie Embryos | Madrid Embryos | Category:Carnegie Stage 22 | Next Stage 23|
|Week 8, GA week 10, 54 - 56 days, CRL 23 - 28 mm, Carnegie Embryos|
|Historic Papers: 1914 | 1954 Stage 19-23|
- Carnegie Stages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | About Stages | Timeline
|Carnegie stage:||1 2 3 4||5 6||7 8 9||10 11 12 13||14 15||16 17||18 19||20 21 22 23|
Cite this page: Hill, M.A. (2021, June 22) Embryology Stage 22 image 217.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Stage_22_image_217.jpg
- © Dr Mark Hill 2021, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
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|current||01:09, 23 August 2011||1,200 × 820 (323 KB)||S8600021||==Human Embryo Developing Cortex== * Week 8, Carnegie stage 22 * Note this section image is vertically flipped compared with serial original serial images. :Links: Neural System Development Cortex-with-section-insert-4.jpg (scan 35815 cropped and sc|