Question

(15 pts) A different patient has had a small stroke. There is some persistent cerebral damag but no evidence of damage to the spinal cord, brainstem, cerebellum, or cranial nerves. The symptoms include complete lack of sensation (pain, temperature, touch, or pressure) in her left cheek and the left side of her lips. There are no other deficits. Where is the cerebral (brain) damage? Include information on: A. the hemisphere (left/right), B. the lobe and the gyrus (or gyri), C. a medial vs. superior vs. lateral location in that gyrus/gyri that describes the location of the damaged region.

Answer 1

Q1) Hemisphere- Right.
Trigeminal nerve carry pain, touch and temperature sensation to its spinal nucleus on the ispsilateral side. Second order neurons which arise from spinal nucleus decussate(crossover) to the contralateral side carry the sensation to primary somatosensory cortex of the brain.

Q2) Parietal lobe, post central gyrus.

Q3) Face is represented in the lateral part of the post central gyrus(primary sensory cortex).