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Palmar interossei

The palmar interossei (also volar interossei, palmar interossei muscles, latin: musculi interossei palmares) are three muscles of the hand that belong to the medial muscle group.

Origin

The palmar interossei muscles arise from the second, fourth and fifth metacarpal bones.

Insertion

The palmar interossei muscles insert onto the proximal phalanges of the second, fourth and fifth digits of the hand.

Action

The main function of the palmar interossei muscles is to adduct the second, fourth and fifth fingers to the axis that passes through the middle finger.

Innervation

The palmar interossei muscles are innervated by the ulnar nerve.