Which nerve is the nerve at a sitting bone?

• A. Sciatic nerve
• B. Common fibular nerve
• C. Obturator nerve
• D. Femoral nerve

Answer: (A)

The ischial tuberosity, or sitting bone, sits in the gluteal/posterior thigh region, and the sciatic nerve travels from the pelvis into the posterior thigh right in that area. It is the largest nerve in the body and supplies most of the leg, running deep to the gluteal muscles and along the back of the thigh where you sit. Because of that close spatial relationship to the sitting bone, it’s the nerve most closely associated with being at the sitting bone.

The other nerves have different paths away from this region: the common fibular nerve is the branch that winds around the fibular head, far from the ischial tuberosity; the obturator nerve passes through the obturator canal to the medial thigh; the femoral nerve runs anteriorly in the thigh beneath the inguinal ligament.