Root | Motor Findings | Sensory Findings Neck, shoulder pain and . . . | Reflexes Affected |
C6 | Shoulder and biceps weakness | Pain numbness in top of arm and thumb | Biceps, brachioradialis, occas. triceps |
C7 | Extension weakness of fingers, wrist and elbow | Pain, numbness in back of forearm and middle finger | Decreased triceps reflex |
C8 | Weak hand intrinsics | Pain, numbness in ulnar arm and hand | (Triceps) |