Which one of the deep lateral rotators of the thigh changes its action from lateral rotation to medial rotation of the thigh at the hip joint if the thigh is first flexed at least 60 degrees or more?
A)piriformis
B)gluteus maximus
C)obturator internus
D)inferior gemellus

Question

Quizplus · Accepted Answer

The piriformis muscle is the only deep lateral rotator of the thigh that changes its action from lateral rotation to medial rotation of the thigh at the hip joint if the thigh is first flexed at least 60 degrees or more. This phenomenon is known as the piriformis syndrome.

Which One of the Deep Lateral Rotators of the Thigh