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You have 20 muscles in your forearm, the part of your arm between your elbow and your hand. They help you move your arms, hands, and fingers and perform many of the tasks of daily life.
The forearm muscles are divided into two compartments based on location and action: the anterior or flexor compartment and the posterior or extensor compartment. There are a total of 19 muscles in the forearm that help move not only the elbow and wrist joints but also the joints in the hand and fingers.
The forearm helps the shoulder and the arm in force application and the precise placement of the hand in space, with the help of the elbow and radioulnar joints. This article is a guide to help you master the anatomy of the forearm and the elbow joint, using the beautiful content of Kenhub.
In this article, we shall look at the anatomy of the muscles in the anterior compartment of the forearm – their attachments, actions, innervation and clinical correlations.
The muscles of the forearm or antebrachium work together to move the elbow, forearm, wrist, and digits of the hand. They fall into two categories: intrinsic and extrinsic muscles. The intrinsic muscles function to move the forearm by pronating and supinating the radius and ulna. The extrinsic muscles flex and extend the digits of the hand.
What are the arm muscles? You have more than twenty muscles in your upper arm and your forearm (the area between your elbow and your wrist). Your arm muscles help you with small, precise (fine motor) movements, such as wiggling your fingers or fastening a button.
Eight muscles arranged in three layers: Superficial. Intermediate. Deep. Supplied by either the median or ulnar nerves. Proximal blood supply: Brachial, ulnar or ulnar recurrent arteries. Distal blood supply: Radial or ulnar arteries. Deep veins mimic the arteries.