Forearm Flashcards
Flexor digitorum profundus origin
Anterior and medial surfaces of the proximal 3/4 of the ulna.
Flexor digitorum profundus insertion
Bases of the distal phalanges, palmar surface and second through fifth fingers.
Flexor digitorum profundus actions
Flex the second through fifth fingers. Assist to flex the wrist.
Flexor digitorum profundus innervation
Median - second and third fingers. Ulnar - fourth and fifth fingers
Flexor digitorum superficialis origin
Common flexor tendon from the medial epicondyle of the humerus, the collateral ligament, coronoid process of the ulna, the interosseous membrane and the proximal shaft of the radius.
Flexor digitorum superficialis insertion
Sides of the middle phalanges of the second through fifth fingers.
Flexor digitorum superficialis actions
Flex the second through fifth fingers
Flexor digitorum superficialis innervation
Median
Which joints can the fingers flex at?
Metacarpophalangeal and proximal and distal interphalangeal joints
Flexor carpi ulnaris origin
Humeral head - Common flexor tendon from the medial epicondyle of the humerus
Ulnar head - Posterior surface of the proximal 2/3 of the ulna
Flexor carpi ulnaris insertion
Pisiform, hook of the hamate and the base of the fifth metacarpal
Flexor carpi ulnaris actions
Flex and adduct the wrist at the radiocarpal joint, assist to flex the elbow.
Flexor carpi ulnaris innervation
Ulnar nerve
Palmaris longus origin
Common flexor tendon from the medial epicondyle of the humerus.
Palmaris longus insertion
Flexor retinaculum and the palmar aponeurosis
Palmaris longus actions
Tense the palmar fascia, flex the wrist at the radiocarpal joint, may assist to flex the elbow.
Palmaris longus innervation
Median nerve
Flexor carpi radialis origin
Common flexor tendon from medial epicondyle of the humerus
Flexor carpi radialis insertion
Bases of second and third metacarpals
Flexor carpi radialis actions
Flex and abduct the wrist at the radiocarpal joint. May assist to flex the elbow.
Flexor carpi radialis innervation
Median nerve
Extensor indicis origin
Posterior surface of the distal shaft of the ulna and the interosseous membrane.
Extensor indicis insertion
Tendon of the extensor digitorum at the level of the second metacarpal
Extensor indicis actions
Extend and adduct the second finger. Mas assist to extend the wrist.
Extensor indicis innervation
Radial nerve
Extensor digitorum origin
Common extensor tendon from the lateral epicondyle of humerus
Extensor digitorum insertion
Bases of middle and distal phalanges of the second through fifth fingers.
Extensor digitorum actions
Extend the second through fifth fingers. Assist to extend the wrist.
Extensor digitorum innervation
Radial
Extensor carpi ulnaris origin
Common extensor tendon from the lateral epicondyle of the humerus
Extensor carpi ulnaris insertion
Base of the fifth metacarpal
Extensor carpi ulnaris actions
Extend and adduct the wrist at the radiocarpal joint.
Extensor carpi ulnaris innervation
Radial nerve
Extensor carpi radialis brevis origin
Common extensor tendon from the lateral epicondyle of the humerus
Extensor carpi radialis brevis insertion
Base of the third metatarsal
Extensor carpi radialis brevis actions
Extend and abduct the wrist, assist to flex the elbow.
Extensor carpi radialis brevis innervation
Radial nerve
Extensor carpi radialis longus origin
Distal third of the lateral supracondylar ridge of the humerus
Extensor carpi radialis longus insertion
Base of the second metacarpal
Extensor carpi radialis longus actions
Extend and abduct the wrist, assist to flex the elbow.
Extensor carpi radialis longus innervation
Radial nerve
Brachialis origin
Distal half of the anterior surface of the humerus
Brachialis insertion
Tuberosity and coronoid process of the ulna.
Brachialis actions
Flex the elbow
Brachialis innervation
Musculocutaneous and a small branch from the radial nerve.
Anconeus actions
Extend the elbow
Anconeus origin
Lateral epicondyle of the humerus
Anconeus insertion
Olecranon process and posterior, proximal surface of the ulna.
Anconeus innervation
Radial
Pronator teres actions
Pronate the forearm and assist to flex the elbow
Pronator teres origin
Common flexor tnedon from the medial epicondyle of the humerus and the coronoid process of the ulna.
Pronator teres insertion
Middle of lateral surface of the radius
Pronator teres innervation
Median
Pronator quadratus actions
Pronate the forearm
Pronator quadratus origin
Medial, anteior surface of the distal ulna.
Pronator quadratus insertion
Lateral, anterior surface of the distal radius
Pronator quadratus innervation
Median
Supinator origin
Lateral epicondyle of the humerus, radial collateral ligament, annular ligament and supinator crest of the ulna
Supinator insertion
Anterior, lateral surface of the proximal third of the radial shaft.
Supinator innervation
Radial
Adductor pollicis actions
Adduct the thumb and assist to flex the thumb.
Adductor pollicis origin
Capitate, second and third metacarpals
Adductor pollicis insertion
Base of proximal phalanx of the thumb
Adductor pollicis innervation
Ulnar
Flexor pollicis longus actions
Flex the thumb and assist to flex the wrist.
Flexor pollicis longus origin
Anterior surface of the radius and interosseous membrane
Flexor pollicis longus insertion
Base of distal phalanx of the thumb
Flexor pollicis longus innervation
Median
Extensor pollicis brevis actions
Extend the thumb and abduct the wrist
Extensor pollicis brevis origin
Posterior surface of the radius and interosseous membrane
Extensor pollicis brevis insertion
Base of proximal phalanx of the thumb.
Extensor pollicis brevis innervation
Radial
Extensor pollicis longus actions
Extend the thumb and abduct the wrist
Extensor pollicis longus origin
Posterior surface of the ulna and interosseous membrane
Extensor pollicis longus insertion
Base of the distal phalanx of the thumb
Brachioradialis actions
Flex the elbow and assist to pronate and supinate the forearm.
Brachioradialis origin
Proximal 2/3 of the lateral supracondylar ridge of the humerus
Brachioradialis insertion
Styloid process of the radius