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Old 04-15-2013
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Zygote Neural Tube Derivatives!

Somebody please help..!!!

There are 2 plates in neural tube, the basal plate gives rise to pre ganglionic sympathetic and parasympathetic neurons and the post ganglionic neurons of ANS come from Neural crest cells.

Now what does the ALAR PLATES give rise to..???

and what is the embryonic origin of somatic sensory and motor nerves??


Please somebody explain....

Thank You
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Old 04-15-2013
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Nervous system------CNS (Brain & Spinal Cord)
PNS
PNS--------------Somatic NS
Autonomic NS

Somatic--------------Motor Neurons--from--Neural tube( from ALAR PLATE??)
Sensory Neurons-------Neural Crest Cells

ANS--------------Preganglionic Neurons---Basal Plate of NEURAL TUBE
Postganglionic Neurons----Neural Crest Cells

Am i getting it right??? Somebody please share their knowledge on this part..

Thanks
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As far i know....

Entire ANS derives from Neural crest cells whether pre or postganglionic neurons.

Alar plate/dorsal/sensory: sensory component of spinal cord derives from alar plate.
Basal/ventral/motor: motor component of spinal cord derives from basal plate.
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Old 04-15-2013
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And yes DRG derive from NCC.
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Old 04-15-2013
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KLN says only postganglionic neurons from NCC..
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