What group of three muscles controls the motion of the little finger?

The hypothenar eminence is a group of muscles located on the ulnar side of the palm, specifically responsible for the movement of the little finger. This group includes the abductor digiti minimi, flexor digiti minimi brevis, and opponens digiti minimi. These muscles work together to facilitate movements such as abduction, flexion, and opposition of the little finger, which are essential for gripping and grasping actions.

In contrast, the thenar eminence focuses on the movements of the thumb and does not have a direct role in controlling the little finger. The flexor group and extensor group refer to broader categories of muscles that are responsible for flexing and extending various parts of the hand and fingers but do not specifically target the motion of the little finger. Thus, the hypothenar eminence is the correct answer as it directly relates to the muscular control required for the motion of the little finger.