Elbow, forearm and wrist MOI Flashcards
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 of the radial nerve
Flexor carpi radialis origin
Common flexor tendor from the medial epicondyle of the humerus
Flexor carpi radialis insertion
Bases of the second and third metacarpals
Flexor carpi radialis actions
Flex and abduct the wrist.
Flexor carpi radialis innervation
Median
Palmaris longus origin
Common flexor tendon from the medial epicondyle of the humerus
Palmaris longus insertion
Flexor retinaculum and palmar aponeurosis
Palmaris longus actions
Tense the palmar fascia and flex the wrist
Palmaris longus innervation
Median
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. Assist to flex the elbow.
Flexor carpi ulnaris innervation
Ulnar
Flexor digitorum superficialis origin
Common flexor tendon from the medial condyle of the humerus, ulnar collateral ligament, coronoid process of the ulna, 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 wrist and the second through fifth fingers.
Flexor digitorum superficialis innervation
Median
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, the palmar surface of teh second through fifth fingers.
Flexor digitorum profundus actions
Flex the second through fifth fingers and assist to flex the wrist.
Flexor digitorum profundus innervation
Median nerve for the second and third fingers, ulnar nerve for the fourth and fifth fingers.
Brachioradialis origin
Proximal 2/3 of the lateral supracondylar ridge of the humerus
Brachioradialis insertion
Styloid process of the radius
Brachioradialis actions
Flex the elbow, the first 90 degrees of pronation and supination
Brachioradialis innervation
Radial nerve
Abductor pollicis longus origin
Posterior surface of the radius and ulna and the interosseous membrane
Abductor pollicis longus insertion
Base of the first metacarpal
Abductor pollicis longus actions
Abduct and extend the thumb. Abduct the wrist.
Abductor pollicis innervation
Radial nerve
Extensor pollicis longus origin
Posterior surface of the ulna and interosseous membrane
Extensor pollicis longus insertion
Base of the distal phalanx of the thumb.
Extensor pollicis longus actions
Extend the thumb. Extend and abduct the wrist.
Extensor pollicis longus innervation
Radial nerve
Extensor pollicis brevis origin
Posterior surface of the radius and interosseous membrane
Extensor pollicis brevis insertion
Base of the proximal phalanx of the thumb
Extensor pollicis brevis actions
Extend the thumb and abduct the wrist.
Extensor pollicis brevis innervation
Radial nerve
Flexor pollicis longus origin
Anterior surface of the radius and interosseous membrane
Flexor pollicis longus insertion
Base of the distal phalanx of teh thumb
Flexor pollicis longus innervation
Median nerve
Flexor pollicis longus actions
Flex the thumb and wrist.
Adductor pollicis origin
Capitate, second and third metacarpals.
Adductor pollicis actions
Adduct and flex the thumb
Adductor pollicis insertion
Base of the proximal phalanx of the thumb
Adductor pollicis innervation
Ulnar nerve
Supinator insertion
Anterior, lateral surface of the proximal third of the radial shaft.
Supinator origin
Lateral epicondyle of the humerus, the radial collateral ligament, annular ligament and supinator crest of the ulna.
Supinator actions
Supinate the forearm
Supinator innervation
Radial nerve
Pronator quadratus origin
Medial, anterior surface of teh distal ulna.
Pronator quadratus insertion
Lateral, anterior surface of the distal radius.
Pronator quadratus action
Pronate the forearm
Pronator teres origin
Common flexor tendon from the medial epicondyle of the humerus and the coronoid process of the ulna.
Pronator quadratus innervation
Median nerve
Pronator teres insertion
Middle of the lateral surface of the radius
Pronator teres action
Pronate the forearm and assist to flex the elbow.
Pronator teres innervation
Median 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
Extenso carpi radialis longus actions
Extend and abduct the wrist, assist to flex the elbow.
Extensor carpi radialis longus innervation
Radial nerve
Extensor carpi radialis brevis origin
Common extensor tendon from the lateral epicondyle of the humerus
Extenso carpi radialis brevis innervation
Radial
Extensor carpi radialis brevis insertion
Base of teh third metacarpal
Extensor carpi radialis brevis actions
Extend and abduct the wrist and assit to flex the elbow.
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
Extensor carpi ulnaris innervation
Radial nerve
Extensor digitorum insertion
Bases of middle and distal phalanges of the second through fifth fingers
Extensor digitorum origin
Common extensor tnedon from the lateral epicondyle of the humerus
Extensor digitorum actions
Extend the second through fifth fingers and assist to extend the wrist
Extensor digitorum innervation
Radial nerve
Extensor indicis origin
Posterior surface of teh 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 innervation
Radial nerve
Extensor indicis actions
Extend and adduct the second finger. May assist to extend the wrist.
Anconeus origin
Lateral epicondyle of the humerus
Anconeous insertion
Olecranon process and posterior, proximal shaft of the ulna.
Anconeus actions
Extend the elbow
Anconeus innervation
Radial nerve