Dermatomes
Cervical
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 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
Thoracic
T1 Medial side of forearm to base of little finger
T2 Medial side of upper arm to medial elbow, pectoral and midscapular areas
T3-T12 T3–T6, upper thorax;
T5–T7, costal margin;
T8–T12, abdomen and lumbar region
Lumbar
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
Sacral
S1 Buttock, thigh, and leg posterior
S2 Same as S1
S3 Groin, medial thigh to knee
S4 Perineum, genitals, lower sacrum