extensor digiti minimi (extensor digiti quinti proprius)

Introduction

Muscle of posterior compartment of forearm.

Origin

lateral epicondyle of humerus

Insertion

• dorsum of proximal, middle & distal phalanges of 5th finger

Action

extends 5th finger

Innervation

radial nerve (posterior interosseous nerve)

More general terms

• skeletal muscle (voluntary muscle)