- Anatomy:
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;
- Discussion:
- 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;
