Question

A lesion to the left "ventral horn" of the spinal cord (and ONLY that region) occurs at C5. Also assume that some postural muscles have output from this point.Which of the following will happen? (Select all that apply)a. Impaired tactile (non-noxious) sensation from left hand.b. Impaired pain sensation from left hand.c. Impaired movement of left hand.d. Impaired movement of left postural muscles.

Answer 1

Answer:

c. Impaired movement of left hand.

d. Impaired movement of left postural muscles.

Explanation:

Assuming that the C-5 controls the postural muscles, the left posture setting of body will be surely affected by that lesion on ventral horn. The C-5 also control the movement of biceps and counter muscle of arm so, the impaired movement shall occur in case of inactivation or under-activation of conduction signal of one of the antagonistic muscle.