Everyday Muscle.

Extensor Digitorum Brevis

That little lump on the outside of your foot — many people mistake it for a bone spur or ganglion cyst.
Function
Extends toes 1-4 at MTP joints
Origin
Anterolateral calcaneus
Insertion
Extensor expansions of digits 2-4 (and base of proximal phalanx of great toe as EHB)
Innervation
Deep fibular nerve (L5-S1)