What Is Arm Pronation?

Pronator muscle: For the muscles that cause internal rotation of the joint, it generally crosses the front of the vertical axis of the joint, such as the pronator muscle and the pronator muscle.

Pronator muscle: For the muscles that cause internal rotation of the joint, it generally crosses the front of the vertical axis of the joint, such as the pronator muscle and the pronator muscle.

Chinese name

Arm pronation

Rotation

alternate motion

Overview of arm pronation :

Pronator sign: continuous flexion and adduction of fingers; special postures when stretching hands and raising arms over head, wrist flexion, metacarpophalangeal joint overextension, each finger straightened apart, arm pronation, called pronation (Pronator sign). Seen in small dance disease.

Alternate motion: Alternate motion refers to instructing the subject to straighten their palms and repeat rapid pronation and supination to observe the coordinated action of the antagonist muscle group.

Chinese name: alternate movement; foreign name: alternate motion.

Anterior dissection of the arm pronation

What muscles do the arms have:

Upper Limb Muscles: The upper limbs are dexterous, including the shoulder muscles, arm muscles, forearm muscles, and hand muscles. The shoulder muscles are distributed around the shoulder joint, and have the function of protecting and moving the shoulder joint. The more important one is the deltoid muscle. The arm muscles are long muscles and can be divided into two groups. The anterior group is flexors, including the biceps, brachialis, and coracalis, and the posterior group is extensors, triceps. The forearm muscles are located around the ulna and radius, and are mostly long rib muscles, which can be divided into two groups, anterior and posterior. The anterior group is the flexor group; the posterior group is the extensor group. The hand muscles are located on the palm. Divided into outer group, inner group and middle group.

Muscle activity:

Muscles often work in pairs, one pulling the bone to one side and the other pulling the bone back in the opposite direction, causing the limb to move. For example, when our upper arm is bent, the biceps contraction becomes shorter and the triceps relaxes and becomes longer. When the triceps contract and the biceps relax, the arm can be straightened. People who often do physical work and physical exercise have relatively developed muscles.

Pronation:

When the arm sags in the natural position, fix the upper arm and rotate the forearm with the palm facing backwards. Often used to check forearm rotation.