Anatomy Answers-2

(D) The nucleus dorsalis (Clarke’s column,
Rexed’s lamina VII of the spinal cord) contains
the cell bodies of the second order neurons of
the dorsal (posterior) spinocerebellar tract.
Axons from these neurons ascend ipsilaterally
in the lateral funiculus of the spinal cord, join
the restiform body of the inferior cerebellar
peduncle, and terminate in the vermis of the
cerebellum as mossy fibers. The dorsal (posterior)
spinocerebellar tract conveys proprioception
from muscle spindles and Golgi tendon
organs. Collateral branches of this tract also
terminate in the deep cerebellar nuclei (choice A).
The dorsal root ganglion (choice B) contains the
cell bodies of sensory neurons, including the
first-order neurons of the dorsal (posterior)
spinocerebellar tract. The nucleus cuneatus
(choice C) contains the second order neurons of
the dorsal column pathways, responsible for
conveying sensations of fine touch, pressure,
and vibration sense. Rexed’s lamina IX of the
spinal cord (choice E) contains the spinal cord
motorneurons responsible for the innervation
of voluntary muscles.

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