Intrinsic muscles mainly modify the actions of the long tendons and generate fine movements of the toes.
All intrinsic muscles of the foot are innervated by the medial and lateral plantar branches of the tibial nerve except for the extensor digitorum brevis, which is innervated by the deep fibular nerve. The first two dorsal interossei also may receive part of their innervation from the deep fibular nerve.
On the dorsal aspect