Main Model
59 Opponens digiti minimi muscle of hand
Opponens digiti minimi
The opponens digiti minimi is a quadrangular muscle that lies deep to the abductor and flexor muscles of the 5th finger. The opponens digiti minimi draws the 5th metacarpal anteriorly and rotates it laterally, thereby deepening the hollow of the palm and bringing the 5th finger into opposition with the thumb. Like the opponens pollicis, the opponens digiti minimi acts exclusively at the carpometacarpal joint.
Opponens digiti minimi
Proximal Attachment: Hook of hamate and flexor retinaculum
Distal Attachment: Medial border of 5th metacarpal
Innervation: Deep branch of ulnar nerve (C8, T1)
Main Action(s): Draws 5th metacarpal anterior and rotates it, bringing 5th digit into opposition with thumb