Why you should learn muscle namesIf you are going to perform weight training, you should familiarize yourself with your musculoskeletal system, or at least learn the names of the major muscles that you will be training. Being familiar with your muscles and how they function will help you to choose the right exercises, practice proper form when you train, and better target your muscles. If you know muscle names, you will also be able to communicate your goals to others more clearly and efficiently.
Depending on who you ask, there are between 640 and 700 named muscles in the human body, which doesn’t include the hundreds of smaller muscles that have not been named. However, for our purposes, we only need to learn the names of the major muscles, most of which I have labeled in the above illustration.
How to memorize muscle names
To help yourself memorize muscle names, identify them in your own body, and try to flex them. You could also write them down, create flash cards, draw a mind map, or even make up a song. I found that the best way to remember muscle names is to draw and label them, as well as describe them to other people.
Muscle names are actually quite interesting. Derived from Latin, a muscle’s name often tells you something about the muscle, such as its location, origin, number of origins, insertion, size, shape, direction, or function.
Many muscle names indicate the muscle’s location. For example, the tibialis anterior is named after the part of the bone that it is attached to (the anterior portion of the tibia), and the names of the brachialis and brachioradialis muscles tell you that they are located in the arm because the word bracchium means “arm” in Latin.
Origin and insertion
Muscles are usually attached to two bones. One end of the muscle attaches to one bone and the other end attaches to another. Usually, when the muscle contracts, one of the bones moves, while the other remains relatively still. The end of the muscle that attaches to the still bone is known as the muscle’s origin, and the end of the muscle that attaches to the moving bone is known as its insertion. Note that the origin and insertion of a muscle can switch depending on the type of movement.
Some muscles are named based on the bones to which they are attached. These muscles become easy to identify if you know the names of the bones that they are attached to. For example, the sternocleidomastoid extends from the sternum (“sterno”) and clavicle (“cleido”) to the mastoid process of the temporal bone, and the occipitofrontalis extends from the occipital bone to the frontal bone.
Number of origins
A number of muscles have more than one origin, and this can be reflected in their names. For example, a biceps muscle has two origins, a triceps muscle has three origins, and a quadriceps muscle has four origins.
Many muscles in a region are distinguished by their size. For example, in the buttocks region, you have the gluteus minimus (small), gluteus medius (medium), and gluteus maximus (large). Longus (longest) and brevis (shortest) are other common suffixes added to muscle names.
Some muscles are named after shapes. For example, the shoulder muscle, more properly known as the deltoid, has a Delta-like or triangular shape; the trapezius has a trapezoid shape; the serratus has a serrated or saw-toothed shape; and the rhomboid major has a rhomboid or diamond-like shape.
The terms rectus (parallel), transverse (perpendicular), and oblique (at an angle) in muscle names tell you the angle in which the muscle’s fibers run relative to the midline of the body. For example, in the abdominal region, the fibers of the rectus abdominis run parallel with the midline, the fibers of the transverse abdominis run perpendicular relative to the midline, and the fibers of the external oblique run at an angle relative to the midline.
Muscles are also sometimes named after their function or action. Terms such as flexor, extensor, abductor, and adductor are added as prefixes to muscle names to indicate the kind of movement that they generate. For example, the wrist flexors flex the wrist, the wrist extensors extend the wrist, and the adductor magnus adducts the thigh (pulls it towards the midline).