Elbow, forearm and wrist MOI Flashcards by Rachael Garratt

Brachialis origin

Distal half of the anterior surface of the humerus

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Brachialis insertion

Tuberosity and coronoid process of the ulna

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Brachialis actions

Flex the elbow

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Brachialis innervation

Musculocutaneous and a small branch of the radial nerve

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Flexor carpi radialis origin

Common flexor tendor from the medial epicondyle of the humerus

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Flexor carpi radialis insertion

Bases of the second and third metacarpals

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Flexor carpi radialis actions

Flex and abduct the wrist.

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Flexor carpi radialis innervation

Median

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Palmaris longus origin

Common flexor tendon from the medial epicondyle of the humerus

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Palmaris longus insertion

Flexor retinaculum and palmar aponeurosis

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Palmaris longus actions

Tense the palmar fascia and flex the wrist

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Palmaris longus innervation

Median

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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

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Flexor carpi ulnaris insertion

Pisiform, hook of the hamate and the base of the fifth metacarpal

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Flexor carpi ulnaris actions

Flex and adduct the wrist. Assist to flex the elbow.

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Flexor carpi ulnaris innervation

Ulnar

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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.

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Flexor digitorum superficialis insertion

Sides of the middle phalanges of the second through fifth fingers.

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Flexor digitorum superficialis actions

Flex the wrist and the second through fifth fingers.

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Flexor digitorum superficialis innervation

Median

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Flexor digitorum profundus origin

Anterior and medial surfaces of the proximal 3/4 of the ulna.

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Flexor digitorum profundus insertion

Bases of the distal phalanges, the palmar surface of teh second through fifth fingers.

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Flexor digitorum profundus actions

Flex the second through fifth fingers and assist to flex the wrist.

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Flexor digitorum profundus innervation

Median nerve for the second and third fingers, ulnar nerve for the fourth and fifth fingers.

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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