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Opponens pollicis

Other Terms: Musculus opponens pollicis, Muscle opposant du pouce

Muscle parts

None

Latin name

Musculus opponens pollicis

Latin muscle parts

None

Group

Hand muscle – thenar group

Etymology

In English, this muscle’s name is the muscle that places the thumb on the opposite side of the hand. The word opponens comes from the Latin opponere meaning “to oppose,” which in turn comes from the Latin terms ob meaning “against” and ponere meaning “to place.” The Latin pollex meaning “thumb” arises from the Latin polleo meaning “to be strong,” as the thumb was the strongest of the fingers.

Origin

Tubercle of the trapezium bone and the flexor retinaculum.

Insertion

Anterior and lateral surfaces of the shaft of first metacarpal bone.

Action

Flexes and rotates toward the little finger (opposes) the carpometacarpal joint of the thumb.

Nerve supply

Median nerve (C8 and T1) with contributions from ulnar nerve (C8 and T1)

Blood supply

Numerous arteries supply the muscle including the superficial palmar branch of the radial artery, the first palmar metacarpal artery, princeps pollicis artery, radialis indicis artery, and the deep palmar arch.

Latin

Musculus opponens pollicis

French

Muscle opposant du pouce

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