The extensor digitorum is one of the main finger extensor muscles in the hand.
Origin
Common extensor tendon from lateral epicondyle of humerus, and deep antebrachial fascia.
Insertion
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.
Function
One of the main finger extensors.
