Extensor Digiti Minimi

Courtesy: Prof Nabil Ebraheim, University of Toledo, Ohio, USA

ANATOMY OF EXTENSOR DIGITI MINIMI
It is the sole extensor of the fifth digit

ORIGIN
From the lateral epicondyle of humerus

INSERTION
Into the extensor expansion of the fifth digit

ACTION
Extends the fifth digit at the metacarpophalangeal and interphalangeal joints

NERVE SUPPLY
Posterior interosseous nerve