Origin: the forepart of the supralateral surface of the Calcaneus;lateral talocalcaneal ligament and cruciate crural ligament;
Insertion: braches into 3 tendons that insert into the lateral sides of the tendons of EDL of 2nd, 3rd, & 4th toes at the level
of the MTP joint;
Action: extends the proximal phalanges of the 2nd, 3rd, and 4th toes.
Nerve Supply: Deep peroneal, L4, L5, S1; (See Innerv. Musc. Lower Limb)
Synergist: Extensor digitorum longus;
- w/ certain modifications and exceptions, the muscles and fasciae of foot are comparable to those of the hand;
- w/ no counterpart in upper limb, the extensor digitorum brevis on dorsum sends a tendon to each of the four medial toes