Which one of the following structures is derived from the neural crest?
A. Dorsal horn of the spinal cord
B. Motor neurons to skeletal muscle
C. Peripheral nerve except motor neurons
D. Ventral horn of the spinal cord
E. Both A and D
ANS: C
Rationale: Nearly all of the peripheral nervous system, with the exception of motor neurons to skeletal muscles, develops from the neural crest. Motor neurons develop from the ventral motor (basal) plate, as does the ventral gray matter of the mature spinal cord. The dorsal association (alar) plate generates the dorsal horn of the spinal cord.
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