It arises from the common Extensor tendon by a thin tendinous slip, from the intermuscular septa between it and the adjacent muscles.
Its tendon runs through a compartment of the dorsal carpal ligament behind the distal radio-ulnar joint, then divides into two as it crosses the hand, and finally joins the expansion of the Extensor digitorum communis tendon on the dorsum of the first phalanx of the little finger.
Absence of muscle rare; fusion of the belly with the Extensor digitorum communis not uncommon.
Four cases of variations in the forearm extensor musculature in a study of hundred limbs and review of literature
Jul 01, 2006; Proper knowledge of muscular variations is essential not only for anatomists but also for surgeons. Additional bellies and the...