Which muscles are supplied by obturator nerve-
**Core Concept**
The obturator nerve is a branch of the lumbar plexus, primarily responsible for innervating the adductor muscles of the thigh. It arises from the anterior divisions of L2-L4 nerve roots and provides motor supply to the adductor group of muscles.
**Why the Correct Answer is Right**
The obturator nerve supplies the adductor muscles of the thigh, including the adductor longus, adductor brevis, adductor magnus (adductor part), and the gracilis muscle. This motor supply enables the coordinated action of these muscles, facilitating thigh adduction. The obturator nerve also provides sensory innervation to the medial aspect of the thigh.
**Why Each Wrong Option is Incorrect**
**Option A:** The femoral nerve is primarily responsible for innervating the muscles of the anterior compartment of the thigh, including the quadriceps femoris and the sartorius muscle.
**Option B:** The sciatic nerve is a major nerve that arises from the lumbar plexus and sacral plexus, providing motor and sensory supply to the posterior thigh muscles and the lower limb.
**Option C:** The tibial nerve is a branch of the sciatic nerve, providing motor supply to the posterior compartment of the leg and sensory innervation to the sole of the foot.
**Option D:** The common peroneal nerve is a branch of the sciatic nerve, responsible for innervating the muscles of the lateral compartment of the leg, including the peroneus longus and peroneus brevis.
**Clinical Pearl / High-Yield Fact**
The obturator nerve is at risk during surgical procedures involving the pelvic region, particularly during hip arthroplasty or pelvic surgery, where damage to this nerve can result in weakness or paralysis of the adductor muscles.
**Correct Answer:** A. Adductor longus, adductor brevis, adductor magnus (adductor part), and the gracilis muscle.