Nerve root | Dermatome |
C1 | Vertex of skull |
C2 | Temple, forehead, occiput |
C3 | Entire neck, posterior cheek, temporal area, prolongation forward under mandible |
C4 | Shoulder area, clavicular area, upper scapular area |
C5 | Deltoid area, anterior aspect of entire arm to base of thumb |
C6 | Lateral anterior arm, radial side of hand to thumb and index finger |
C7 | Lateral arm and forearm to index, long, and ring fingers |
C8 | Medial arm and forearm to long, ring, and little fingers |
T1 | Medial side of forearm to base of little finger |
T2 | Medial side of upper arm to medial elbow, pectoral and midscapular areas |
T3-T6 | Upper thorax |
T5-T7 | Costal margin |
T8-T12 | Abdomen and lumbar region |
L1 | Back, over trochanter and groin |
L2 | Back, front of thigh to knee |
L3 | Back, upper buttock, anterior thigh and knee, medial lower leg |
L4 | Medial buttock, lateral thigh, medial leg, dorsum of foot, big toe |
L5 | Buttock, posterior and lateral thigh, lateral aspect of leg, dorsum of foot, medial half of sole, first, second, and third toes |
S1 | Lateral and plantar aspect of foot |
S2 | Buttock, thigh, and leg posterior |
S3 | Groin, medial thigh to knee |
S4 | Perineum, genitals, lower sacrum |