muscles of the forearm: anterior Flashcards
Pronator teres
O: medial epicondyle of humerus, coronoid process of ulna
I: common tendon into lateral radius, midshaft
N: median nerve
K: pronates forearm, weak flexor of elbow
Flexor carpi radialis
O: medial epicondyle of humerus
I: base of second and third metacarpals
N: median nerve
K: powerful flexor of wrist, abducts hand, weak synergist of elbow flexion
Palmaris longus
O: medial epicondyle of humerus
I: palmar aponeurosis
N: median nerve
K: tenses skin and fascia of palm during hand movement, weak wrist flexor, weak synergist for elbow flexion
Flexor carpi ulnaris
O: medial epicondyle of humerus, olecranon process and posterior surface of ulna
I: pisiform and hamate bones and base of fifth metacarpal
N: ulnar nerve. roots c7, c8
K: powerful flexor of wrist, adducts hand in concert with extensor carpi ulnaris, stabilizes wrist during extension
Flexor digitorum superficialis
O: medial epicondyle of humerus, coronoid process of ulna, shaft of radius
I: four tendons into middle phalanges of fingers 2-5
N: median nerve. roots: C7, c8, T1
K: flexes wrist and middle phalanges of fingers
Flexor pollicis longus
O: anterior surface of radius and interosseous membrane
I: distal phalanx of thumb
N: branch of median nerve. roots: c8, t1
K: flexes distal phalanx of thumb
Flexor digitorum profundus
O: coronoid process, anteromedial surface of ulna, and interosseous membrane
i: four tendons into distal phalanges of fingers 2-5
N: medial half by ulnar nerve, lateral half by median nerve
K: flexes distal interphalangeal joints, slow acting flexor of any or all fingers, assists in flexing wrist
Pronator quadratus
O: distal portion of anterior ulnar shaft
I: distal surface of anterior radius
N: median nerve. roots: c8, t1
K: prime mover of forearm pronation, acts with pronator teres, helps hold ulna and radius together
