Table 1.

Foot drop of peripheral origin

Nerve	Motor	Sensory	Weakness
L5 nerve root	Gluteus maximus/medius/minumus, tensor fasciae latae, semitendinosus, semimembranosus, biceps femoris, tibialis posterior, TA, PL, PB, EDB, EHL (gastrocnemius/soleus)	Lateral leg, lateral calf, dorsum of foot, and medial toes	Hip abduction and internal rotation Knee flexion Ankle dorsiflexion, inversion, and eversion Toe extension (plantarflexion)
Lumbosacral plexopathy avariable presentation: example is lesion proximal to sciatic nerve	Gluteus medius/ minimus, tensor fascia lata, semitendinosus, semimembranosus, biceps femoris, tibialis posterior, flexor digitorum longus, abductor hallucis, flexor digitorum brevis, flexor hallucis brevis, abductor digiti minimi, adductor hallucis, interossei, TA, EDL, EHL, EDB, EHB, PT, PL, PB, gastrocnemius, soleus (partial adductor magnus)	Posterior thigh, lateral calf, dorsal and plantar foot (sparing lateral foot)	Hip internal rotation and abduction, knee flexion, ankle dorsiflexion, plantarflexion, inversion and eversion Toe extension (partial hip adduction)
Sciatic nerve	Semitendinosus, semimembranosus, biceps femoris, tibialis posterior, flexor digitorum longus, abductor hallucis, flexor digitorum brevis, flexor hallucis brevis, abductor digiti minimi, adductor hallucis, interossei, TA, EDL, EHL, EDB, EHB, PT, PL, PB, gastrocnemius, soleus (partial adductor magnus)	Lateral calf, dorsal and plantar foot (sparing lateral foot)	Knee flexion Ankle dorsiflexion, plantarflexion, inversion and eversion Toe extension (partial hip adduction)
Common peroneal nerve	TA, EDL, EHL, EDB, EHB, PT, PL, PB	Lateral calf and dorsum of foot (sparing lateral and plantar foot)	Ankle dorsiflexion and eversion Toe extension
Deep peroneal nerve	TA, EDL, EHL, EDB, EHB, PT	Area between great and second toes	Ankle dorsiflexion and partial eversion > inversion Toe extension
Superficial peroneal nerve	PL, PB	Lateral calf and dorsum of foot (sparing lateral foot)	Ankle eversion

^aTA = tibialis anterior, PL = peroneus longus, PB = peroneus brevis, EDB = extensor digitorum brevis, EHL = extensor hallucis longus, EDL = extensor digitorum longus, PT = peroneus tertius, EHB = extensor hallucis brevis