Innervation for tensor fascia lata?

Innervation for tensor fascia lata?

• A. inferior gluteal nerve
• B. superior gluteal nerve
• C. femoral nerve
• D. obturator nerve

Answer: (B)

This question hinges on which nerve supplies the tensor fasciae latae and how that relates to hip function. The tensor fasciae latae is innervated by the superior gluteal nerve, which carries fibers from the L4 to S1 region and travels in the gluteal region, exiting the pelvis above the piriformis to supply the gluteus medius, gluteus minimus, and the tensor fasciae latae. This innervation pattern explains why the TFL helps with hip flexion, abduction, and medial rotation, and why it plays a key role in stabilizing the pelvis during gait. When the superior gluteal nerve is affected, weakness in these muscles can lead to a Trendelenburg-type gait due to poor support of the pelvis on the stance leg. The other nerves listed innervate different muscles: the inferior gluteal nerve supplies gluteus maximus, the femoral nerve innervates the anterior thigh muscles (like the quadriceps), and the obturator nerve innervates the medial thigh adductors.

This question hinges on which nerve supplies the tensor fasciae latae and how that relates to hip function. The tensor fasciae latae is innervated by the superior gluteal nerve, which carries fibers from the L4 to S1 region and travels in the gluteal region, exiting the pelvis above the piriformis to supply the gluteus medius, gluteus minimus, and the tensor fasciae latae. This innervation pattern explains why the TFL helps with hip flexion, abduction, and medial rotation, and why it plays a key role in stabilizing the pelvis during gait. When the superior gluteal nerve is affected, weakness in these muscles can lead to a Trendelenburg-type gait due to poor support of the pelvis on the stance leg. The other nerves listed innervate different muscles: the inferior gluteal nerve supplies gluteus maximus, the femoral nerve innervates the anterior thigh muscles (like the quadriceps), and the obturator nerve innervates the medial thigh adductors.