Method for Learning

of the lower vertebrae of the spine under the trapezius, and still of the vertebrae, the loins, and the rump. It covers the entire back of the chest on both sides, just as the straight muscle covers the front, and at the top, it attaches to the shoulder blades and the subscapularis, with which it forms a tendon on each side, attaching to the arms, as we noted; it inserts further from the armpits to the hips in a very evident way, encountering the large serratus and the external oblique.

Here are the main muscles of the surface of the chest in front and behind; now let us move on to the muscles of the other limbs.

The arms, in addition to the deltoid we spoke about, each have a bicep muscle, which originates from the shoulder blade and descends along the arm bone to insert at the radius of the forearm, allowing it to bend. The brachialis is a muscle that originates from the arm bone, passing under the bicep muscle, attaching to the elbow bone to assist in the movement of the forearm: this muscle is very large and visible on each side of the bicep muscle.

At the back of the arm, there is also a large muscle called the elbow extensor: it seems to be composed of two muscles, which join before reaching the elbow; one, called the long & internal, is on the side of the armpit, originating from the shoulder blade; the other, named the short & external, originates from the arm bone. They join a little above the elbow and together insert at the elbow bone. Their junction is even visible when the arm makes the slightest movement.

The forearm should be considered from the palm side of the hand, which is its top; and from the elbow side, which is its underside.