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| Root injury | Dermatome pain | Muscle supplied | Movement weakness | Reflex involved |
| C5 | Lower lateral aspect upper arm | Deltoid and biceps | Shoulder abduction, elbow flexion | Biceps |
| C6 | Lateral aspect of forearm | Extensor carpi radialis longus and brevis | Wrist extensors | Brachioradialis |
| C7 | Middle finger | Triceps and flexor carpi radialis | Extension of elbow, flexion of wrist | Triceps |
| C8 | Medial aspect of forearm | Flexor digitorum superficialis and profundus | Finger flexion | None |