Chapter 11 Book-specific Clinical Case Activity 10 of 24

The origin of the hamstring muscles is on the ischial tuberosity; where are their insertions?

The biceps femoris inserts on the head of the fibula and lateral condyle of the tibia, the semimembranosus inserts on the posterior surface of the medial condyle of the tibia, and the semitendinosus inserts on the medial surface of the tibia.

In complex movements, muscles commonly work in groups rather than individually. The hamstrings flex the knee. Which muscles are antagonists to the hamstrings?

rectus femoris, vastus intermedius, vastus lateralis, vastus medialis

David sustained a complete avulsion of his hamstring tendons from their origin on the ischial tuberosity. Hamstrings are part of what class of lever at the knee?

third class lever

One of the extensors of the knee, the rectus femoris, has a distinct arrangement of fascicles, which facilitate the muscle contraction at the knee. Which arrangement is this known as?

bipennate