Back, over trochanter and groin
L1
Back, front of thigh to knee
L2
Back, upper buttock, anterior thigh and knee, medial lower leg
L3
Medial buttock, lateral thigh, medial leg, dorsum of foot, big toe
L4
Buttock, posterior and lateral thigh, lateral aspect of leg, dorsum of foot, medial half of sole, first, second, and third toes
L5
Buttock, thigh, posterior leg
S1 and S2
Groin, medial thigh to knee
S3
Perineum, genitals, lower sacrum
S4