License Image superficial flexors The muscles of the forearm can be divided into two groups: anterior (flexors) and posterior (extensors). Both the flexors and extensors are further divided into superficial and deep layers. The forearm muscles that control the movement of the hands are known as extrinsic hand muscles. These muscles originate outside the hand […]
License Image deep flexors The deep flexors of the forearm are the flexor pollicis longis, flexor digitorum profundus and the pronator quadratus. The digitorum profundus flexes the four fingers and the pollicis longis flexes the thumb. (Closing your hand into a fist flexes the fingers and thumb). The pronator quadratus pronates the forearm and hand.
License Image superficial extensor The superficial extensors of the forearm are the brachioradialis, extensor carpi radialis longus, anconeus, extensor carpi radialis brevis, extensor carpi ulnaris, extensor digitorum and extensor digiti minimi. The extrinsic hand muscles originate in the forearm and insert on structures within the hand. They control movements of the wrist, hand, fingers and […]
License Image deep extensors The deep extensors of the forearm are the supinator, abductor pollicis longus, extensor pollicis longus, extensor pollicis brevis, extensor indicis. The extrinsic hand muscles originate in the forearm and insert on structures within the hand. These muscles control movements of the wrist, hand, fingers and thumb. The supinator rotates, or supinates, […]