Opponens digiti minimi muscle

Opponens digiti minimi muscle is a muscle in the hand that functions to flex and laterally rotate the little finger at the metacarpophalangeal joint. It is one of the three hypothenar muscles that control the movement of the little finger.

Anatomy

The opponens digiti minimi muscle originates from the flexor retinaculum and the hook of the hamate, a small bony prominence in the wrist. It inserts into the entire length of the metacarpal bone of the little finger.

Function

The primary function of the opponens digiti minimi muscle is to oppose the little finger, which means it moves the little finger towards the thumb. This is an important movement for grasping objects. The muscle also helps in flexing and laterally rotating the little finger at the metacarpophalangeal joint.

Clinical significance

Damage to the opponens digiti minimi muscle can result in a loss of ability to oppose the little finger, which can significantly impact hand function. This can occur due to injury or conditions such as carpal tunnel syndrome or ulnar nerve palsy.

See also

• Opponens pollicis muscle
• Flexor digiti minimi brevis muscle
• Abductor digiti minimi muscle