buttock. It:
Starts on the front surface of the sacrum (base of the spine)
Passes through the greater sciatic foramen
Attaches to the greater trochanter of the femur (upper thigh bone)
Its main functions include:
External rotation of the hip
Hip abduction
Hip extension
Although small, the piriformis helps stabilize the hip during movement.
What Is Piriformis Syndrome?
Piriformis syndrome occurs when the piriformis muscle becomes tight, inflamed, or spasms, placing pressure on the sciatic nerve.
Because the sciatic nerve runs underneath—or sometimes through—the piriformis muscle, irritation of this muscle
