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Nerve Root Involvement from Herniated Disc

Root Disc Sensory Motor Reflex
C 5 C 4-5 Lateral & Anterior Arm (Axillary nerve) Deltoid, Rotator cuff Biceps
C6 C 5-6 Radial Forearm (Musculocutaneus) Dorsum of Hand (Superficial Radial) Biceps, Extensor carpi radialis longus & brevis, Brachioradialis Brachioradialis
C7 C 6-7 3rd. digit (Median & radial) Triceps, Extensor digitorum, Flexor carpi radialis Triceps
C8 C7-T1 Ulnar side of forearm, hand & 4&5th digits Med. Antebrachial cutaneous, Ulnar Flexor digitorum superficialis & profundus ***
T1 T1-2 Medial side of arm Medial Brachial Cutaneous Interossei, Lumbricals, thenar ***
L3 L2-3 Anterior & Medial Thigh (femoral) Quadriceps
Adductors
***
L4 L3-4 Medial leg (saphenous br. of femoral n.) Tibialis anterior
Tibialis posterior
Patellar
L5 L4-5 Lateral leg & dorsum of foot (common peroneal) Extensor Digitorum Longus; Gluteus medius & minimus
S1 L5-S1 Lateral & plantar surface of foot (sural; tibial) Peroneus longus & brevus; triceps surae, gluteus maximus Achilles



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Last Modified: March 8, 2011