The prime mover of thigh extension against resistance is the a. gluteus maximus, b. gluteus medius, c. biceps femoris, d. semimembranosus.

Video transcript

Hi, everyone. Let's take a look at this practice problem together. What does the term sterno clio mastoid indicate in a muscle's name? The answer options are a, the location of the muscle's origin and insertion. B, the size of the muscle, C, the shape of the muscle and d the number of origins of the muscle. So recall that the sternal plyo mastoid is a long neck muscle. It's often abbreviated S C M and it rotates and flexes the neck. Now the muscle has two origins. So there's the sternum and the clavicle. And in the name, we have Sterno for sternum and clio for clavicle. The S C M has a single insertion and that is on the mastoid process of the temporal bone. And thus you get mastoid in the name. So we have again, Sterno for sternum clio for clavicle and mastoid for mastoid process. That means the correct answer is option. A the location of the muscles origin and insertion. All right, everyone. I hope you found this helpful and I'll see you soon for the next practice problem.