The primary somatosensory cortex:
A. Receives information directly from the basal ganglia.
B. Processes unconscious somatosensory information.
C. Receives information via the dorsal column/medial lemniscus, and trigeminothalamocortical systems.
D. Processes auditory and vestibular information.
E. Performs none of the above.
ANS: C
Rationale: The primary somatosensory cortex processes conscious somatosensory information. This area of the cortex receives information from tactile and proprioceptive receptors via a pathway consisting of a peripheral afferent/dorsal column neuron, medial lemniscus, and thalamocortical neuron. Processing of auditory and vestibular information occurs in the primary auditory and primary vestibular cortices.
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