Lesions in what location(s) will result in decreased or lost sensation from the contralateral body or face?
A. Ventral posterolateral (VPL) nucleus of the thalamus
B. Ventral posteromedial (VPM) nucleus of the thalamus
C. A and B
D. None of the above
ANS: C
Rationale: Lesions in the VPL or VPM nucleus of the thalamus result in decreased or lost sensation from the contralateral body or face because all somatosensory information has crossed the midline before reaching the thalamus. Rarely, people who have strokes that affect the VPL or VPM nucleus have severe pain in the contralateral body or face.
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