Local leg lesions

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Lower extremity: Motor & Sensory innervation

Roots
Root lesions

Arms

Nerves
Femoral
Lateral femoral cutaneous
Obturator
Peroneal, Common
Deep
Superficial

		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	.	+	+	+	.	.	.	.
Adductors	Obturator	.	+	+	+	.	.	.	.
Adductor magnus	Obturator Sciatic, Tibial portion	.	+	+	+	+	+	.	.
Gracilis	Obturator	.	+	+	+	.	.	.	.
Gluteus med & min	Superior gluteal	.	.	.	+	+	+	.	.
Gluteus maximus	Inferior gluteal	.	.	.	.	+	+	+	.
Pyriformis	Sacral Plexus	.	.	.	.	.	+	+	.
Biceps (short head)	Sciatic (Peroneal)	.	.	.	.	+	+	+	.
Biceps (long head)	Sciatic (Tibial)	.	.	.	.	ą	+	+	ą
Semitendinosus	Sciatic (Tibial)	.	.	.	.	+	+	+	.
Anterior tibial	Deep peroneal	.	.	.	+	+	.	.	.
Ext. hallucis longus	Deep peroneal	.	.	.	.	+	+	.	.
Peronei	Superficial peroneal	.	.	.	.	+	+	.	.
Posterior tibial	Tibial	.	.	.	.	+	+	.	.
Gastrocnemius	Tibial	.	.	.	.	.	+	+	.
Soleus	Tibial	.	.	.	.	.	+	+	.
Flexor digitorum brevis	Medial plantar	.	.	.	.	+	+	.	.
Abductor hallucis	Medial plantar	.	.	.	.	.	+	+	.
Interossei	Lateral plantar	.	.	.	.	.	+	+	.

LUMBO-SACRAL 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