ABSTRACT
Patients with foot drop often present with falls, as their toes fail to clear the ground.
Foot drop is due to weakness of tibialis anterior, a muscle supplied by the common
peroneal nerve and L4/5 roots. The common peroneal nerve also supplies the peroneal
muscles which evert the foot; the L4/5 roots also supply tibialis posterior which inverts
the foot. Weakness of tibialis anterior can result from lesions of the corticospinal tract,
as well as from lesions of the peripheral nerves or roots.
