Final answer:
The piriformis muscle may entrap the sciatic nerve, leading to sciatica.
Step-by-step explanation:
When tight, the piriformis muscle may entrap the sciatic nerve. The piriformis is a deep muscle located in the gluteal region that helps with the rotation of the femur at the hip joint. However, when it becomes tight or spasms, it can compress or irritate the sciatic nerve, leading to a condition called sciatica. This can cause pain, tingling, or numbness along the pathway of the sciatic nerve, which extends from the lower back down through the buttocks and into the back of the leg.