Which one of the following spinal cord laminae contains cell bodies of lower motor neurons?
A. VIII
B. IX
C. X
D. Both A and B
ANS: B
Rationale: Lamina VIII cells connect with the contralateral cord and the brain. Lamina IX contains cell bodies of lower motor neurons, whose axons travel through a ventral root, a spinal nerve, and then a peripheral nerve to innervate skeletal muscles. Lamina X consists of axons crossing to the opposite side of the cord.
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