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Palmar interossei

Other Terms: Palmar interossei, Palmar interosseous muscle group of hand, Musculi interossei palmares, Muscle interosseux palmaires

Muscle parts

None

Latin name

Musculi interossei palmares

Latin muscle parts

None

Group

Hand muscle – intermetacarpal group

Etymology

This muscle’s name in English is the muscle between the bones on the flat of the hand. Interossei comes from the Latin terms inter meaning “between” and os meaning “bone.” The word palmaris is from the Latin palma for “the flat of the hand.”

Origin

Anterior surface of the length of the metacarpal bones 1, 2, 4, and 5 on the side toward the middle finger.

Insertion

Base of proximal phalanges and extensor expansion of digits 1, 2, 4, and 5 on the middle finger side.

Action

Adduction of digits 1, 2, 4, and 5 at the metacarpophalangeal joints; assist with flexion of the metacarpophalangeal joints; extend the interphalangeal joints.

Nerve supply

Ulnar nerve (C8 and T1)

Blood supply

The palmar interossei receive blood from the deep palmar arch, the princeps pollicis artery, the radialis indicis artery, palmar metacarpal arteries, and common and proper palmar digital arteries.

Latin

Musculi interossei palmares

French

Muscle interosseux palmaires

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