![]() ![]() It attaches to the mid region of the radius. Attachments: The pronator teres has two origins, one on the proximal end of the humerus and one of the distal end of the ulna.Actions: Flexion and abduction at the wrist.Attachments: Originates from the humerus and attaches to the base of the digits.Flexor Carpi Radialis: A long muscle originating near the elbow and passing through into the wrist.Attachments: Originates from the humerus and attaches to the base of the hand.Palmaris Longus: A long muscle originating near the elbow and passing through into the wrist.Actions: Flexion and adduction at the wrist.Attachments: Originates from the humerus and ulna and attaches to one of the carpal bones in the wrist.Flexor Carpi Ulnaris: A long muscle originating near the elbow and passing through into the wrist.Three muscles are located in the superficial layer of the anterior compartment of the forearm. Those located within the hand are referred to as intrinsic. Muscles of the forearm that act on the wrist and hand are referred to as extrinsic muscles, or external to the hand. Often providing the more forceful movements required. Muscles and tendons of the forearm and hand: The extrinsic muscles of the forearm are responsible for movement of the wrist and fingers. These muscles can generate highly variable force, from the strong grip required when lifting a heavy object to the delicate movements required to write. The wrist and hand exhibit a remarkable range of movement, key for grasping and interaction with objects. Muscles associated with the wrist include those of the forearm and hand that move the wrist and digits. Pronator quadratus: A square-shaped muscle located adjacent to the wrist.Flexor Pollicis Longus: A long, deep muscle responsible for flexing the thumb. ![]()
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