Main Model
65 Tendon of extensor indicis muscle
Extensor indicis
Proximal Attachment: Posterior surface of distal third of ulna and interosseous membrane
Distal Attachment: Extensor expansion of 2nd digit
Innervation: Posterior interosseous nerve (C7, C8), continuation of deep branch of radial nerve
Main Action(s): Extends 2nd digit (enabling its independent extension); helps extend hand at wrist