If a muscle crosses the metacarpophalangeal joint of a finger on the side toward the middle finger,what will its eccentric function of the finger be?
A)restrains/slows flexion
B)restrains/slows extension
C)restrains/slows abduction
D)restrains/slows adduction

Question

Quizplus · Accepted Answer

Muscles that cross a joint on the side can control movements toward or away from the midline of the body. In the case of the fingers, a muscle crossing on the side toward the middle finger would be involved in controlling (restraining or slowing) abduction, which is the movement of the finger away from the midline of the hand.

If a Muscle Crosses the Metacarpophalangeal Joint of a Finger