Neuromuscular

Home, Search, Index, Links, Pathology, Molecules, Syndromes,
Muscle, NMJ, Nerve, Spinal, Ataxia, Antibody & Biopsy, Patient Info

Lower extremity: Motor & Sensory innervation

Roots
  Root lesions

Arms
Nerves
Femoral
Lateral femoral cutaneous 
Obturator
Peroneal, Common
  Deep
  Superficial

Sciatic
Sural
Tibial, Posterior
  Calcaneal
  Plantar nerves


Roots

Roots
Muscle Nerve L1 L2 L3 L4 L5 S1 S2 S3
Psoas minor Lumbar Plexus + + . . . . . .
Psoas major Lumbar plexus + + + . . . . .
Sartorius Femoral . + + . . . . .
Quadriceps (Vasti; Rectus) Femoral . + + + . . . .
Adductor longus Obturator . + + + . . . .
Adductor magnus Obturator
Sciatic, Tibial portion
. + + + + + . .
Gracilis Obturator . + + + . . . .
Gluteus med & min Superior gluteal . . . + + + . .
Tensor fascia lata Superior gluteal . . . + + + . .
Gluteus maximus Inferior gluteal . . . . + + + .
Piriformis Sacral Plexus . . . . . + + .
Biceps (short head) Sciatic (Peroneal) . . . . + + + .
Biceps (long head) Sciatic (Tibial) . . . . ± + + ±
Semitendinosus Sciatic (Tibial) . . . . + + + .
Anterior tibial Deep peroneal . . . + + . . .
Ext. hallucis longus Deep peroneal . . . . + + . .
Peronei, except tertius Superficial peroneal . . . . + + . .
Posterior tibial Tibial . . . . + + . .
Gastrocnemius Tibial . . . . . + + .
Soleus Tibial . . . . . + + .
Flexor digitorum brevis Medial plantar . . . . + + . .
Abductor hallucis Medial plantar . . . . . + + .
Interossei Lateral plantar . . . . . + + .



Lumbar & Lumbosacral Root Lesions: clinical Features
Root Motor Involvement Sensory Loss Pain Location Reflex Disorder
L1 None Inguinal Inguinal None
L2 Psoas Thigh, Lateral & Anterior Groin
Thigh, Anterior
None
L3 Psoas
Quadriceps
Hip adductors
Thigh, Medial
Knee
Thigh, Anterior
Leg, Anterior
Knee
L4 Quadriceps
Hip adductors
Tibialis anterior
Leg, Lower medial Leg
  Anterior & Medial
Knee
L5 Toes, Extensor & Flexor
Ankle, Dorsiflex, Inversion & Eversion
Hip, Abductor
Leg, Lower lateral
Foot, Dorsum & Great toe
Thigh, Lateral
Leg, Lower lateral
Foot, Dorsum
? Hamstring
S1 Gastrocnemius
Hamstrings
Gluteus maximus
Toe flexors
Foot, Lateral 2 toes & Plantar
Ankle, Lateral
Thigh, Posterior
Leg, Lower posterior
Foot, Posterior
Ankle
S2-4 None Buttocks, Medial
Perineum
Perianal
Buttocks, Medial Bulbocavernosus
Anal wink
Also see: Lumbosacral plexopathies

Trendelenburg Gait

Ely’s (Femoral nerve stretch) test

Lumbar Plexus


Lumbosacral Plexus


Sensory nerves: Lower trunk & Thigh


Nerve anatomy: Other

Arms
Brachial plexus
External links
  Digital nerves
  Cutaneous fields

Muscle Anatomy
  External links

Iliac
Thigh
Leg
Foot

Go to: Upper extremity innervation
Return to Neuromuscular home page

5/3/2018