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Stages in the early development of the spinal cord. A. The neural plate is generated from ectodermal cells that overlie the notochord (N) and the future
somites (S). It is flanked by the epidermal ectoderm.
B. The neural plate folds dorsally at its midline to form the neural fold. Floor plate cells (blue) differentiate at the ventral midline of the neural tube.
C. The neural tube forms by fusion of the dorsal tips of the neural folds. Roof plate cells form at the dorsal midline of the neural tube. Neural crest cells
migrate from the neural tube into and past the somites before populating the sensory and sympathetic ganglia.
Source:of
Patterning
System,
Principles
of Neuralpositions
Science,in
Fifth
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Principles
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Science,
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Available
of the spinal cord. (Adapted,
with permission,Accessed:
from Goulding
2002.)
at: http://mhmedical.com/
May et
10,al.2017
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