Which is true?
A)the only action of the piriformis is lateral rotation of the thigh at the hip joint
B)from anatomic position,the piriformis can laterally rotate the thigh at the hip joint but the piriformis can also medially rotate the thigh at the hip joint if the hip joint is already in approximately 60 degrees of flexion or more
C)the piriformis can ipsilaterally rotate the pelvis at the hip joint
D)none of the above

Question

Quizplus · Accepted Answer

From anatomic position, the piriformis can laterally rotate the thigh at the hip joint, but it can also medially rotate the thigh at the hip joint if the hip joint is already in approximately 60 degrees of flexion or more. Therefore, option A is incorrect. The piriformis is not responsible for ipsilateral rotation of the pelvis at the hip joint, so option C is also incorrect. Therefore, option D is incorrect.

Which Is True