Gluteus medius muscle is supplied by
**Core Concept**
The gluteus medius muscle is a key component of the gluteal region, responsible for hip abduction and stabilization. It is innervated by a specific nerve that arises from the sacral plexus, which is a complex network of nerves that supply the lower limb.
**Why the Correct Answer is Right**
The gluteus medius muscle is primarily innervated by the superior gluteal nerve, a branch of the sacral plexus that originates from the L4-S1 nerve roots. The superior gluteal nerve is responsible for motor innervation of the gluteus medius and gluteus minimus muscles, as well as the tensor fasciae latae muscle. This nerve innervation plays a crucial role in the movement and stability of the hip joint.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because the inferior gluteal nerve primarily innervates the gluteus maximus muscle, not the gluteus medius.
* **Option B:** This option is incorrect because the nerve to the piriformis muscle is a branch of the sacral plexus, but it does not innervate the gluteus medius muscle.
* **Option D:** This option is incorrect because the sciatic nerve is a large nerve that arises from the sacral plexus, but it is primarily responsible for innervating the muscles of the posterior thigh, not the gluteus medius.
**Clinical Pearl / High-Yield Fact**
The superior gluteal nerve can be damaged during surgical procedures in the gluteal region, leading to weakness of the gluteus medius muscle and potential hip instability.
**Correct Answer:** C.