Template:Early Neural Timeline table
From Embryology
Carnegie stage 8 - (about 18 postovulatory days) neural groove and folds are first seen
- Carnegie stage 9 - the three main divisions of the brain, which are not cerebral vesicles, can be distinguished while the neural groove is still completely open.
- Carnegie stage 10 - (two days later) neural folds begin to fuse near the junction between brain and spinal cord, when neural crest cells are arising mainly from the neural ectoderm
- Carnegie stage 11 - (about 24 days) the rostral (or cephalic) neuropore closes within a few hours; closure is bidirectional, it takes place from the dorsal and terminal lips and may occur in several areas simultaneously. The two lips, however, behave differently.
- Carnegie stage 12 - (about 26 days) The caudal neuropore takes a day to close.
- the level of final closure is approximately at future somitic pair 31.
- corresponds to the level of sacral vertebra 2.
- Carnegie stage 13 - (4 weeks) the neural tube is normally completely closed.
Human Shoulder Development | |
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Stage | Event |