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Do any parts of the corpus striatum send nerve fibers directly to the spinal cord?
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No, the parts of the corpus striatum—which includes the caudate nucleus, putamen, and globus pallidus—do not send nerve fibers directly to the spinal cord.1
The corpus striatum functions as a complex processing center within the basal ganglia. Its output is primarily directed toward the thalamus and other nuclei within the basal ganglia, such as the substantia nigra and the subthalamic nucleus, rather than to spinal levels.21