Anatomy
Origin:
Hook of the hamate and the flexor retinaculum.
Insertion:
Ulnar aspect of the fifth metacarpal.
Key Relations:
Is one of the muscles of the hypothenar eminence of the hand.
Functions
Flexion and lateral rotation (i.e.opposition) of the fifth metacarpal at the carpometacarpal and metacarpophalangeal joint.
Supply
Nerve Supply:
Deep branch of the ulnar nerve (C8, T1).
Blood Supply:
Deep palmar branch of the ulnar artery.
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