Forearm Flashcards
Flexor Pollicis Longus
A: Flex the thumb (interphalangeal joint) Flex the thumb (metacarpophalangeal andcarpometacarpal joints) Assist to flex the wrist (radiocarpal joint)
O: Anterior surface of radius and interosseous membrane
I: Base of distal phalanx of thumb
Extensor Pollicis Longus and Brevis
A: Extend the thumb (interphalangeal joint), EPL only Extend the thumb (metacarpophalangeal and carpometacarpal
joints) Abduct the wrist (radiocarpal joint)
O: Longus: Posterior surface of ulna and interosseous membrane Brevis: Posterior surface of radius and interosseous membrane
I: Longus: Base of distal phalanx of thumb Brevis: Base of proximal phalanx of thumb
Abductor Pollicis Longus
A: Abduct the thumb (carpometacarpal joint) Extend the thumb (carpometacarpal joint) Abduct the wrist (radiocarpal joint)
O: Posterior surface of radius and ulna, and interosseous membrane
I: Base of first metacarpal
Supinator
A: supinate the forearm(radioulnar joints)
O: lateral epicondyle of humerus, radial collateral ligament, annular
ligament, and supinator crest of the ulna
I: Anterior, lateral surface of proximal one-third of radial shaft
Pronator Quadratus
A: Pronate the forearm (radioulnar joints)
O: Medial, anterior surface of distal ulna
I: Lateral, anterior surface of distal radius
Pronator Teres
A: Pronate the forearm(radioulnar joints) Assist to flex the elbow(humeroulnar joint)
O: Common flexor tendon frommedial epicondyle of humerus andcoronoid process of the ulna
I: Middle of lateral surface of the radius
Flexor Digitorum Profundus
A: Flex the second through fifth fingers (metacarpophalangeal and distal interphalangeal joints) Flex the wrist (radiocarpal joint)
O: Anterior and medial surfaces of proximal three-quarters of ulna
I: Bases of distal phalanges, palmar surface of second through fifth fingers
Flexor Digitorum Superficialis
A: Flex the second through fifth fingers (metacarpophalangeal and proximal interphalangeal joints) Flex the wrist (radiocarpal joint)
O: Common flexor tendon from medial epicondyle of humerus, ulnar collateral ligament, coronoid process of ulna, interosseous membrane, and proximal shaft of radius
I: Sides of middle phalanges of second through fifth fingers
Flexor Carpi Ulnaris
A: flex the wrist Adduct the wrist (radiocarpal joint) Assist to flex the elbow(humeroulnar joint)
O: Humeral head: Common flexor tendon frommedial epicondyle of humerus Ulnar head: Posterior surface of proximal two-thirds of ulna
I: Pisiform, hook of the hamate, and base of fifth metacarpal
Palmaris Longus
A: Tense the palmar fascia Flex the wrist (radiocarpal joint) May assist to flex the elbow (humeroulnar joint)
O: Common flexor tendon from medial epicondyle of humerus
I: Flexor retinaculum and palmar aponeurosis
Flexor Carpi Radialis
A: Flex the wrist (radiocarpal joint) Abduct the wrist (radiocarpal joint) May assist to flex the elbow (humeroulnar joint)
O: Common flexor tendon from medial epicondyle of humerus
I: Bases of second and third metacarpals
Extensor Digitorum
A: Extend the second through fifth fingers (metacarpophalangeal and interphalangeal joints) Assist to extend the wrist (radiocarpal joint)
O: Common extensor tendon from the lateral epicondyle of humerus
I: bases of middle and distal phalanges of second through fifth fingers
Extensor Carpi Ulnaris
A: Extend the wrist (radiocarpal joint) Adduct the wrist (radiocarpal joint)
O:Common extensor tendon from the lateral epicondyle of humerus
I:Base of fifth metacarpal
Extensor Carpi Radialis Brevis
A: Extend the wrist (radiocarpal joint) Abduct the wrist (radiocarpal joint) Assist to flex the elbow (humeroulnar joint)
O: Common extensor tendon from the lateral epicondyle of humerus
I: Base of third metacarpal
Extensor Carpi Radialis Longus
A: Extend the wrist (radiocarpal joint) Abduct the wrist (radiocarpal joint) Assist to flex the elbow (humeroulnar joint)
O: Distal one-third of the lateral supracondylar ridge of humerus
I: Base of second metacarpal
