The Only Knee Flexor That Originates Superior to the Acetabulum

Question

The only knee flexor that originates superior to the acetabulum is the
A) biceps femoris.
B) gracilis.
C) sartorius.
D) iliopsoas.
E) semimembranosus.

Accepted Answer

The sartorius muscle is the only knee flexor that originates superior to the acetabulum. The biceps femoris, semimembranosus, and gracilis all originate inferior to the acetabulum. The iliopsoas is a hip flexor muscle and does not directly act on the knee.