Muscle origin and insertion for lec 7.docx

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University of Toronto Scarborough
Biological Sciences
Connie Boudens

Muscle Origin Insertion Biceps brachii Short head from the coracoid Radial tuberosity process; long head from the supraglenoid tubercle (both on the scapula) Brachialis Distal half of the anterior surface Ulnar tuberosity and coronoid of the humerus process Brachioradialis Ridge superior to the lateral Lateral aspect of styloid process epicondyle of humerus of radius Anconeus Posterior surface of lateral Lateral margin of olecranon and epicondyle of humerus ulnar shaft Triceps brachii -lateral head Superior, lateral margin of Olecranon of ulna humerus -long head Infraglenoid tubercle of scapula As above -medial head Posterior surface of humerus, As above inferior to radial groove Pronator quadratus Anterior and medial surfaces of Anterolateral surface of distal distal ulna portion of radius Pronator teres Medial epicondyle of humerus Middle of lateral surface of and coronoid process of ulna radius Supinator Lateral epicondyle of humerus Anterolateral surface of radius and ridge near radial notch of distal to the radial tuberosity ulna Flexor carpi radialis Medial epicondyle of humerus Bases of second and third metacarpal bones Flexor carpi ulnaris Medial epicondyle of humerus; Pisiform, hamate, and base of adjacent medial surface of fifth metacarpal bone olecranon and anteromedial portion of ulna Palmaris longus Medial epicondyle of humerus Palmar aponeurosis and flexor retinaculum Extensor carpi radialis longus Lateral supracondyle ridge of Base of second metacarpal bone humerus Extensor carpi radialis brevis Lateral epicondyle of humerus Base of third metacarpal bone Extensor carpi ulnaris Lateral epicondyle of humerus; Base of fifth metacarpal bone adjacent dorsal surface of ulna Flexor digitorum superficialis Medial epicondyle of humerus; To bases of middle phalanges of coronoid process of ulna and digits 2-5 adjacent anterior surfaces of ulna and radius Flexor digitorum profundus Medial and posterior surfaces of Base of distal phalanges of digits ulna, medial surfaces of coronoid 2-5 process, and interosseous membrane Flexor pollicis longus Anterior shaft of radius, Base of distal phalanx of thumb interossesous membrane Abductor pollicis longus Proximal dorsal surfaces of ulna Lateral margin of first and radius metacarpal bone and trapezium Extensor digitorum Lateral epicondyle of humerus Posterior surfaces of the phalanges, digits 2-5 Extensor pollicis brevis Shaft of radius distal to origin of Base of proximal phalanx of abductor pollicis longus and the thumb interosseous membrane Extensor indicis Posterior surface of ulna and Posterior surface of proximal interosseous membrane phalanx of index finger (2), with tendon of extensor digitorum Extensor digiti minimi Via extensor tendon to lateral Posterior surface of proximal epicondyle of humerus and from phalanx of little finger intermuscular septa Adductor pollicis Metacarpal and carpal bones Proximal phalanx of thumb Opponens pollicis Trapezium and flexor First metacarpal bone retinaculum Abductor digiti minimi Pisiform Proximal phalanx of little finger Abductor pollicis brevis Transverse carpal ligament, Radial side of base of proximal scaphoid and trapezium phalanx of thumb Flexor pollicis brevis* Flexor retinaculum, trapezium, Radial and ulnar sides of capitate, palmar ligaments of proximal phalanx of thumb distal row of carpal bones, and ulnar side of first metacarpal Flexor digiti minimi brevis Hook of the hamate and flexor Proximal phalanx of little finger Retinaculum Opponens digiti minimi As above Fifth metacarpal bone Lumbrical (4) The four tendons of flexor Tendons of extensor digitorum
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