![]() Learn the muscles that act on the forearm using interactive animations below and test your knowledge with labeling diagrams and worksheets. Deep layer : Supinator, abductor pollicis longus, extensor pollicis brevis, extensor pollicis longus and extensor indicis The forearm muscles are broadly divided into two compartments: the anterior flexor compartment and the posterior extensor compartment. ![]() Superficial layer : Brachioradialis, extensor carpi radialis longus, extensor carpi radialis brevis, extensor digitorum, extensor digiti minimi, extensor carpi ulnaris and anconeus.Their primary functions are extension of the hand and supination of the forearm. ![]() The extensors of the forearm reside in the posterior compartment of the forearm.
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