Nerve root syndromes

Disc level	Root Compressed	Pain Distribution	Sensory Pattern	Motor Weakness	Reflex Affected
C4–5	C5	Shoulder	Shoulder	Shoulder abduction	Deltoid
C5–6	C6	Upper arm, lateral forearm, and first two digits	Upper arm, lateral forearm, and first two digits	Forearm flexion	Biceps and brachioradialis
C6–7	C7	Second to fourth digits	Second to fourth digits and all fingertips	Forearm, wrist, and finger extension	Triceps
C7–T1	C8	Upper arm, medial forearm, and last two digits	Upper arm, medial forearm, and last two digits	Wrist and finger flexion	Finger jerk
L3–4	L4	Anterior thigh	Anterior thigh to medial malleolus	Quadriceps	Patellar
L4–5	L5	Posterolateral leg to hallux	Lateral thigh to dorsum of foot and great toe	Tibialis anterior and extensor hallucis longus	Medial hamstring
L5–S1	S1	Posterior leg and lateral and plantar aspects of the foot	Posterior thigh and leg to lateral malleolus	Gastrocnemius/ soleus	Achilles