Dermatomes in the lower limb are shown in Fig. 6.16. Regions that can be tested for sensation and are reasonably autonomous (have minimal overlap) are: over the inguinal ligament—L1, lateral side of the thigh—L2, lower medial side of the thigh—L3, medial side of the great toe (digit I)—L4, medial side of digit II—L5, little toe (digit V)—S1, back of the thigh—S2, and skin over the gluteal fold—S3.