The basic topics you would want to learn are: 1  definition of categories, and some examples of categories. 2  functors, and examples of them. 3  natural transformations, and examples of them. 4  definitions of products, coproducts and exponents (function spaces), initial and terminal objects.
Sternocleidomastoid muscle. In human anatomy, the sternocleidomastoid muscle (/ËstÉËrnoÊËklaÉªdÉËmÃ¦sËtÉÉªd, -nÉ-, -doÊ-/[1][2]), also known as sternomastoid and commonly abbreviated as SCM, is a paired muscle in the superficial layers of the side of the neck. It is one of the largest and most superficial cervical muscles.
The sternocleidomastoid muscle flexes the neck and helps with movement of the head. Also, the muscle works with the scalene muscles in the neck during forced inspiration while breathing (inhaling), and it raises the sternum, the bone at the front of the rib cage.he sternocleidomastoid muscle flexes the neck and helps with movement of the head. Also, the muscle works with the scalene muscles in the neck during forced inspiration while breathing (inhaling), and it raises the sternum, the bone at the front of the rib cage.