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UE Muscles

Muscle Test 3

Muscle
Brachialis O: anterior distal half of humerus I: coronoid process and tuberosity of ulna A: flex forearm at elbow Musculocutaneous Nerve C5-C6
Biceps Brachii O: LH-supraglenoid tubercle of scapula SH- coracoid process of scapula I: radial tuberosity and bicipital aponeurosis to fascia on medial side of forearm A: weakly flex arm at shoulder flex and supinate forearm Musculocutaneous Nerve C5-C7
Brachioradialis O: lateral supracondylar ridge of humerus I: styloid process of radius A: flex forearm at elbow Radial Nerve C5-C6
Triceps Brachii LONG HEAD O: infraglenoid tubercle of scapula I: posterior olecranon process of ulna A: extend arm at shoulder extend forearm at elbow Radial Nerve C7-C8
Triceps Brachii MEDIAL HEAD O: inferior 2/3 of posterior humerus I: posterior olecranon process of ulna A: extend forearm at elbow Radial Nerve C7-C8
Triceps Brachii LATERAL HEAD O: proximal portion of posterior humerus superior to radial groove I: posterior olecranon process of ulna A: extend forearm at elbow Radial Nerve C7-C8
Anconeus O: lateral epicondyle of humerus I: posterior olecranon process of ulna A: extend forearm at elbow Radial Nerve C7-C8
Pronator Teres O: HH- medial epicondyle of humerus and distal supracondylar ridge UH- medial side of coronoid process of radius I: middle of lateral surface of radius A: pronate and flex forearm Median Nerve C6-C7
Flexor Carpi Ulnaris (FCU) O: medial epicondyle of humerus I: pisiform, hook of hamate, and bade of 5th metacarpal A: flex and ulnar deviates hand Ulnar Nerve C8-T1
Flexor Carpi Radialis (FCR) O; medial epicondyle of humerus I: bases of 2nd and 3rd metacarpals A: flex and radial deviates hand Median Nerve C6-C7
Palmaris Longus (PL) O: medial epicondyle of humerus I: flexor retinaculum and palmar aponeurosis A: flex hand and tense palmar aponeurosis Median Nerve C7-C8
Extensor Carpi Radialis Longus (ECRL) O: distal lateral supracondylar ridge I: base of 2nd metacarpal (dorsal surface) A: extends and radial deviates hand Radial Nerve C6-C7
Extensor Carpi Radialis Brevis (ECRB) O: lateral epicondyle of humerus I: base of 3rd metacarpal (dorsal surface) A: extend and radial deviate hand Radial Nerve C6-C7
Extensor Carpi Ulnaris (ECU) O: lateral epicondyle of humerus I: base of 5th metacarpal (dorsal surface) A: extend and ulnar deviates hand Radial Nerve C6-C8
Flexor Digitorum Superficialis (FDS) O: HUH- medial epicondyle of humerus and coronoid process of ulna RH- upper anterior surface of radius I: middle phalanges of digits 2-5 A: flex middle phalanges; if continues, flexes proximal phalanges, hand, and forearm Median Nerve C7-T1
Extensor Digitorum O: lateral epicondyle of humerus I: distal phalanges via dorsal mechanism of digits 2-5 (extensor expansion) A: extend wrist and fingers 2-5 (middle phalanx) Deep Branch of Radial nerve C6,C8
Pronator Quadratus O: medial side of anterior surface of distal 1/4 ulna I: lateral side of distal 1/4 radius A: pronate forearm Anterior Interosseous Branch of Median Nerve C8-T1
Supinator O: lateral epicondyle of humerus, annular and radial collateral ligaments, and supinator crest of ulna I: lateral surface of upper 1/3 of body of radius A: supinates forearm Radial Nerve C6
Flexor Digitorum Profundus (FDP) O: medial and anterior surfaces of proximal 3/4 of ulna and interosseous membrane I: by 4 tendons into the anterior surface of distal phalanges 2-5 A: flex distal IP joints 2-5, adduct 2,4,5 and flex hand Ulnar Nerve; Interosseous Branch Median C7-T1
Extensor Indicis O: interosseous membrane and posterior surface of ulna I: into extensor expansion (dorsal surface) of proximal phalanx of index finger A: extend index finger at MCP joint Posterior Interosseous Branch of Radial Nerve C6-C8
Extensor Digiti Minimi (EDM) O: common tendon from lateral epicondyle of humerus I: dorsal surface base of distal phalanx of 5th finger A: extend 5th finger Radial Nerve C6-C8
Flexor Pollicis Longus (FPL) O: middle of anterior shaft of radius and interosseous membrane I: palmar surface of base of distal phalanx of thumb A: flex thumb; assist abduction of wrist Anterior Interosseous Branch of Median Nerve C8-T1
Abductor Pollicis Longus (APL) O: Posterior surface of body of ulna distal to origin of supinator, interosseous membrane, middle 1/3 body of radius I: dorsal surface base of 1st met A: abduct and extend 1st finger; abduct wrist Posterior Interosseous Branch Radial Nerve C6-C8
Extensor Pollicis Brevis (EPB) O: distal 1/3 dorsal surface of radius and adjacent part of interosseous membrane I: base of proximal phalanx of thumb A: extend thumb; abduct hand Radial Nerve C6-C7
Extensor Pollicis Longus (EPL) O: inteross mem. and middle 1/3 posterior surface of ulna I: dorsal surface base of distal phalanx of thumb A: extend IP joint, assist extension MCP joint, assist abduction/extension wrist, lat rotation thumb Post. Interos. Branch Radial Nerve C6-C8