In Plain English
The forearms are the muscles between your elbow and wrist, wrapping around the radius and ulna before continuing into the hand through long tendons. They control your grip, move your wrist and fingers, rotate your forearm, and provide the strength and precision needed for nearly every task involving your hands.
Technical Definition
The forearms comprise the anterior flexor-pronator compartment and posterior extensor-supinator compartment, along with muscles such as the brachioradialis and pronator quadratus. These muscles originate primarily from the medial and lateral epicondyles of the humerus, as well as the radius and ulna, before inserting into the carpal bones, metacarpals, and phalanges through long tendons. Collectively, they produce wrist flexion, wrist extension, finger flexion, finger extension, forearm pronation, forearm supination, and contribute to grip strength and fine motor control.





















