Which of the following symptoms would a patient with a lesion (injury) that destroyed the right...

Which of the following symptoms would a patient with a lesion (injury) that destroyed the right side of the spinal cord in the region of the upper back be most likely to experience?

A. Loss of both pressure sense and pain in the right foot

B. Loss of both pressure sense and pain in the left foot

C. Loss of pressure sense in the right foot and pain in the left foot

D. Loss of pressure sense in the left foot and pain in the right foot

Solutions

Expert Solution

B. Loss of both pressure sense and pain in the left foot.

Spinothalamic tract is an ascending pathway , which are two types .Anterior spinothalamic tract and lateral spinothalamic tract.
Anterior spinothalamic tract carries pressure and crude touch sensation , where as lateral spinothalamic tract carries pain and temperature sensation.
Spinothalamic tract decussate at the level of spinal cord , hence damage to spinal cord leads to loss of sensation of opposite side ( contralateral sensory loss).
Both pressure and pain are carried by spinothalamic tract , damage to right side of spinal cord leads to loss of sensation of both at Left side .
Option A is wrong because , due to decussation there will be contralateral sensory loss.
Option C and D are wrong because both pressure and pain are carried by spinothalamic tract , hence if there is injury occur to spinothalamic tract both sensations will be lost.

Sydney Mullin answered 8 months ago

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