The neurosurgeon had removed a portion of the dense tissue (dura mater) covering the brain of the patient when she removed the tumor that had invaded the skull. To replace this important tissue covering of the brain, she took a band of the aponeurotic tissue of the lateral aspect of the thigh, covering the vastus lateralis muscle. What muscle, supplied by the inferior gluteal nerve, inserts into this band of dense tissue as part of its insertion?

**Core Concept**
The dura mater, a dense tissue covering the brain, was removed during surgery, and a band of aponeurotic tissue from the lateral aspect of the thigh was used to replace it. This tissue is part of the iliotibial tract, which is the fascial extension of the tensor fasciae latae muscle. The iliotibial tract is a thickened fascia that runs down the lateral aspect of the thigh, from the iliac crest to the tibia.

**Why the Correct Answer is Right**
The Gluteus maximus muscle inserts into the iliotibial tract, a band of dense tissue that runs down the lateral aspect of the thigh. This muscle is a large, fan-shaped muscle that covers the posterior aspect of the hip joint and plays a crucial role in hip extension and external rotation. The inferior gluteal nerve, a branch of the sacral plexus, innervates the Gluteus maximus muscle, allowing it to contract and insert into the iliotibial tract. The Gluteus maximus muscle's insertion into the iliotibial tract is a key anatomical feature that allows it to transmit forces to the lower limb.

**Why Each Wrong Option is Incorrect**
**Option A:** The Gluteus medius muscle inserts into the greater trochanter of the femur and is innervated by the superior gluteal nerve, not the inferior gluteal nerve.
**Option B:** The Gluteus minimus muscle also inserts into the greater trochanter of the femur and is innervated by the superior gluteal nerve, making it an unlikely candidate for the correct answer.
**Option D:** The Tensor fasciae latae muscle inserts into the iliotibial tract, but it is innervated by the superior gluteal nerve, not the inferior gluteal nerve.

**Clinical Pearl / High-Yield Fact**
The iliotibial tract is a common site for snapping hip syndrome, a condition characterized by a clicking or snapping sensation in the hip joint. This is often caused by the iliotibial tract rubbing against the greater trochanter of the femur.

**✓ Correct Answer: C. Gluteus maximus**

✓ Correct Answer: C. Gluteus maximus