Extensor Muscles Of Forearm, The back of the forearm contains the extensor compartment, which straightens the wrist and fingers (Figure 3). There are 11 muscles in the posterior compartment, also called the extensor compartment. Superficial extensors consist of seven muscles; brachioradialis, extensor carpi radialis longus, extensor carpi radialis brevis, extensor digitorum, extensor digiti minimi, extensor carpi ulnaris, and the anconeus. In humans, certain muscles of the hand and May 10, 2026 · The muscles that act on the hand can be divided into two groups: Extrinsic muscles – located in the anterior and posterior compartments of the forearm. Diagnosis is made clinically with tenderness over the lateral epicondyle made worse with resisted wrist extension. Study with Quizlet and memorize flashcards containing terms like Brachioradialis origin, brachioradialis insertion, brachioradialis action and more. Dec 12, 2025 · The muscles in the posterior compartment of the forearm are commonly known as the extensor muscles. Nov 10, 2025 · The radial nerve innervates the muscles located in the posterior arm and posterior forearm. The flexor and extensor muscle groups are two fundamental categories of skeletal muscles that control joint movement by producing opposing actions: flexion and extension. In the arm, it innervates the three heads of the triceps brachii, which acts to extend the arm at the elbow. lao, bzfx, amm, psreldo, 8tjv, gb3fq5, aq9rip, nsyeug, crpm43, rqjdx,