Forearm and wrist Flashcards
Brachialis
Action: Flex the elbow
Origin: Distal half of anterior surface of humerus
Insertion: Tuberosity and coronoid process of ulna
Nerve: Musculocutaneous, small branch from radial C5,6
Brachioradialis
Action: Flex the elbow; assist to pronate/supinate forearm when these movements are resisted
Origin: Proximal 2/3 lateral supracondylar ridge of humerus
Insertion: styloid process of radius
Nerve: Radial C5,6
Extensor Carpi Radialis Longus
Action: Extend wrist; abduct wrist; assist to flex elbow
Origin: Distal 1/3 lateral supracondylar ridge of humerus
Insertion: Base of 2nd metacarpal
Nerve: Radial C5,6,7,8
Extensor Carpi Radialis Brevis
Action: Extend wrist; abduct wrist; assist to flex elbow
Origin: common extensor tendon from lateral epicondyle of humerus
Insertion: Base of 3rd metacarpal
Nerve: Radial C6,7,8
Extensor Digitorum
Action: extend 2nd-5th fingers; assist to extend wrist
Origin: common extensor tendon from lateral epicondyle of humerus
Insertion: base of middle and distal phalanges of 2nd-5th fingers
Nerve: Radial C6,7,8
Extensor Carpi Ulnaris
Action: Extend wrist; adduct wrist
Origin: common extensor tendon from lateral epicondyle of humerus
Insertion: base of 5th metacarpal
Nerve: radial C6,7,8
Anconeus
Action: extend elbow
Origin: lateral epicondyle of humerus
Insertion: olecranon process and posterior, proximal surface of ulna
Nerve: radial C7,8
Extensor Indicis
Action: extend 2nd finger; adduct 2nd finger; may assist to extend wrist
Origin: posterior surface of distal shaft of ulna and interosseous membrane
Insertion: tendon of the extensor digitorum at the level of 2nd metacarpal
Nerve: radial C6,7,8
Flexor Carpi Radialis
Action: Flex the wrist; Abduct the wrist; may assist to flex the elbow
Origin: Common flexor tendon from medial epicondyle of humerus
Insertion: Bases of second and third metacarpals
Nerve: Median C6, 7, 8
Palmaris Longus
Action: Tense the palmar fascia; Flex the wrist; may assist to flex the elbow
Origin: Common flexor tendon from medial epicondyle of humerus
Insertion: Flexor retinaculum and palmar aponeurosis
Nerve: Median C(6), 7, 8, T1
Flexor Carpi Ulnaris
Action: Flex the wrist; Adduct the wrist; assist to flex the elbow
Origin: Humeral head: Common flexor tendon from medial epicondyle of humerus
Ulnar head: posterior surface of proximal two-thirds of ulna
Insertion: Pisiform, hook of the hamate and base of fifth metacarpal
Nerve: Ulnar C7, 8, T1
Flexor Digitorum Superficialis
Action: Flex the second through fifth fingers (MCP & PIP); Flex the wrist
Origin: Common flexor tendon from medial epicondyle of humerus, ulnar collateral ligament, coronoid process of ulna, interosseous membrane and proximal shaft of radius
Insertion: Sides of middle phalanges of second through fifth fingers
Nerve: Median C7, 8, T1
Flexor Digitorum Profundus
Action: Flex the second through fifth fingers; Assist to flex the wrist
Origin: Anterior and medial surfaces of proximal three-quarters of ulna
Insertion: Bases of distal phalanges, palmar surface of second through fifth fingers
Nerve: First and second: Median C7, 8, T1
Third and fourth: Ulnar C7, 8, T1
Pronator Teres
Action: Pronate the forearm; assist to flex the elbow
Origin: Common flexor tendon from medial epicondyle of humerus and coronoid process of ulna
Insertion: Middle of lateral surface of the radius
Nerve: Median C6, 7
Pronator Quadratus
Action: Pronate the forearm
Origin: Medial, anterior surface of distal ulna
Insertion: Lateral, anterior surface of distal radius
Nerve: Median C7, 8, T1
