Muscles Actions, Origins & Insertions Practice Test

Which muscle inserts on the lesser trochanter?

Gluteus maximus Tensor fasciae latae Iliopsoas Infraspinatus

Correct Answer:

Iliopsoas

Explanation:

The key idea is where a muscle attaches to the femur and how that relates to its function. The lesser trochanter is the insertion site for the iliopsoas tendon, which is formed by the fusion of the psoas major and iliacus. This muscle is the primary hip flexor, so attaching there allows it to lift the thigh toward the torso and help stabilize the pelvis when you stand or walk. Gluteus maximus attaches to the gluteal tuberosity and the iliotibial tract, not the lesser trochanter. Tensor fasciae latae inserts into the iliotibial tract rather than the femur itself. Infraspinatus attaches to the greater tubercle of the humerus, which is in the shoulder region, not the thigh. Therefore, the muscle that inserts on the lesser trochanter is the iliopsoas.

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