Question

If you had a lesion of the right "dorsal horn" (and ONLY this region) of the spinal cord at the level C5 (cervical 5), and all information to the right arm goes into this region, which of the following symptoms would you expect to have? (Select all that apply)
A. Impaired touch (non-painful) perception of the right arm.
B. Impaired pain perception of the right arm.
C. Impaired movment of the right arm.
D. Impaired movement of the postural muscles of the right side.

Answer 1

Answer:

A. Impaired touch (non-painful) perception of the right arm.

B. Impaired pain perception of the right arm.

Explanation:

the dorsal horn is responsible for receiving and processing somatosensory information. This sensory information is then transmitted to the brain and diencephalon. Hence, the dorsal horn is only associated with sensory nuclei and could impair sensations of touch and pain. The ventral horn comprises of motor neuron and could impair movement of arm or postural muscles.