Muscle Anatomy

extensor digitorum

The extensor digitorum is one of the main finger extensor muscles in the hand.


Common extensor tendon from lateral epicondyle of humerus, and deep antebrachial fascia.


By four tendons, each penetrating a membranous expansion of the dorsum of the second to fifth digits and dividing over the proximal phalanx into a medial and two lateral bands.


One of the main finger extensors.