The Supinator and Pronator Muscles

Question

The supinator and pronator muscles
A) have their origin on the sternum and clavicle.
B) act synergistically with the sternocleidomastoid muscles.
C) are located in the lower extremities.
D) change the position of the hand.

Accepted Answer

The supinator and pronator muscles are located in the forearm and are responsible for changing the position of the hand. Option A is incorrect as the origin of these muscles is on the humerus and ulna bones. Option B is incorrect as the sternocleidomastoid muscles are located in the neck and have no relation to the supinator and pronator muscles. Option C is incorrect as these muscles are not located in the lower extremities.