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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 |
Nerve anatomy: OtherArmsBrachial plexus External links Digital nerves Cutaneous fields |
Muscle Anatomy
Iliac |