Hip adduction is primarily mediated by which nerve roots via the Adductors?

• A. S1
• B. L2, L3, L4
• C. L4, L5
• D. L5, S1

Answer: (B)

The muscles that adduct the hip (adductor longus, adductor brevis, gracilis, and the adductor part of adductor magnus) are supplied mainly by the obturator nerve, which carries nerve roots from L2 to L4. This means the primary signal driving hip adduction comes from L2–L4 via the obturator nerve as it innervates these medial thigh muscles. The adductor magnus is a special case: it has an additional innervation to its hamstring part from the tibial portion of the sciatic nerve (L4–S3), but for pure hip adduction through the adductor group, L2–L4 is the key range. So the best answer reflects the primary innervation pattern for these muscles.