Neuroassistant

Sciatic nerve

Plexus: Lumbosacral

Roots: L4L5S1S2S3

Origin: Anterior and posterior divisions of the lumbosacral plexus

Motor innervation:

Biceps femoris, long head

Branch: Tibial nerve

Roots: L4L5S1S2S3

Biceps femoris, short head

Branch: Common fibular nerve

Roots: L4L5S1S2

Semimembranosus

Branch: Tibial nerve

Roots: L5S1S2

Branch: Tibial nerve

Roots: L5S1S2

Branch: Tibial nerve

Roots: S1S2

Branch: Tibial nerve

Roots: L5S1S2

Branch: Tibial nerve

Roots: L5S1S2

Flexor digitorum longus

Branch: Tibial nerve

Roots: L5S1S2

Flexor hallucis longus

Branch: Tibial nerve

Roots: S1S2

Tibialis posterior

Branch: Tibial nerve

Roots: L5S1S2

Peroneus longus

Branch: Superficial fibular nerve

Roots: L4L5S1

Peroneus brevis

Branch: Superficial fibular nerve

Roots: L4L5S1

Extensor digitorum longus

Branch: Deep fibular nerve

Roots: L4L5

Extensor digitorum brevis

Branch: Deep fibular nerve

Roots: L4L5

Extensor hallucis longus

Branch: Deep fibular nerve

Roots: L4L5

Tibialis anterior

Branch: Deep fibular nerve

Roots: L4L5

Peroneus tertius

Branch: Deep fibular nerve

Roots: L4L5

Flexor digitorum brevis

Branch: Medial plantar nerve (from tibial nerve)

Roots: S1S2

Adductor hallucis

Branch: Lateral plantar nerve (from tibial nerve)

Roots: S1S2

Flexor hallucis brevis

Branch: Medial plantar nerve (from tibial nerve)

Roots: S1S2

Lumbrical I (foot)

Branch: Medial plantar nerve (from tibial nerve)

Roots: S1S2

Lumbricals II-IV (foot)

Branch: Lateral plantar nerve (from tibial nerve)

Roots: S1S2

Adductor digiti quinti

Branch: Lateral plantar nerve (from tibial nerve)

Roots: S1S2

Abductor digiti quinti

Branch: Lateral plantar nerve (from tibial nerve)

Roots: S1S2

Quadratus plantae

Branch: Lateral plantar nerve (from tibial nerve)

Roots: S1S2

Flexor digiti minimi brevis

Branch: Lateral plantar nerve (from tibial nerve)

Roots: S1S2

Interossei dorsales

Branch: Lateral plantar nerve (from tibial nerve)

Roots: S1S2

Interossei plantares

Branch: Lateral plantar nerve (from tibial nerve)

Roots: S1S2

Sensory innervation:

Superior, lateral part of leg

Branch: Common fibular nerve

Roots: L4L5S1S2

Inferior, anterolateral part of leg and dorsum of foot

Branch: Superficial fibular nerve

Roots: L4L5S1

Posterior, lateral part of leg and lateral edge of foot.

Branch: Sural nerve (from tibial and common fibular nerves)

Roots: S1S2

Medial part of sole of foot and toes 1-4

Branch: Medial plantar nerve (from tibial nerve)

Roots: L4L5

Lateral part of sole of foot and toes 4-5

Branch: Lateral plantar nerve (from tibial nerve)

Roots: S1S2

Heel and posterior sole of foot.

Branch: Medial calcaneal nerves (from tibial nerve)

Roots: S1S2

Syndromes:

Piriformis syndrome

Peroneal nerve syndrome

Tarsal tunnel syndrome