Dylan Crake RMT & R.KIN

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Arm

Muscle	Attachements	Nerve Supply	Actions	Special Tests
Biceps Brachii	O: Coracoid process of scapula, Supraglenoid tubercle of scapula I: Aponeurosis of Biceps Brachii, Tuberosity of radius	Musculocutaneous Nerve	– Supinate forearm – Flexes forearm – Flexes shoulder	Speed’s Test, Yergason’s Test
Brachialis	O: Distal half of anterior surface of humerus I: Coronoid process and tuberosity of ulna	Musculocutaneous Nerve	– Flexes forearm	Brachialis Strength and Length Tests
Coracobrachialis	O: Coracoid process I: Middle third of medial surface of humerus	Musculocutaneous Nerve	– Flex arm – Adduct arm	Coracobrachialis Strength and Length Tests
Triceps Brachii	O: Infraglenoid tubercle of scapula, posterior surface of humerus I: Olecrannon	Radial Nerve	– Extends arm -Extends forearm	Radial Nerve Floss

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Forearm Flexors

Muscle	Attachements	Nerve Supply	Actions	Special Tests
Flexor Carpi Radialis	O: Medial epicondyle of humerus I:Base of 2nd metacarpal	Median Nerve	– Flexes hand -Abducts hand	Median Nerve Floss
Flexor Carpi Ulnaris	O: Medial epicondyle of humerus, Olecranon I: Pisiform, Hook of hamate, 5th metacarpal	Ulnar Nerve	– Flexes hand -Adducts hand	Ulnar Nerve Test
Flexor Digitorum Superficialis	O: Medial epicondyle of humerus, Coronoid process of ulna, Oblique line of radius I:Shafts of middle phalanges of medial four digits	Median Nerve	– Flexes proximal interphalangeal joints of middle four digits	Median Nerve Floss
Pronator Teres	O: Coronoid process of ulna, Medial epicondyle of humerus I: Lateral surface of radius	Median Nerve	– Pronates forearm -Flexes forearm	Pronator Teres Syndrome Test
Palmaris Longus	O: Medial epicondyle of humerus I: Distal half of flexor retinaculum, palmar aponeurosis	Median Nerve	– Flexes hand -Tenses palmar aponeurosis	Schaeffer’s Test

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Forearm Extensors

Muscle	Attachements	Nerve Supply	Actions	Special Tests
Brachioradialis	O: Proximal 2/3rds of lateral supra-epicondylar ridge of humerus I: Lateral surface of distal end of radius proximal to styloid process	Radial Nerve	– Weak forearm flexion – Maximal forearm flexion when midpronated	Brachioradialis Strength and Length Tests
Extensor Carpi Radialis Longus	O: Lateral supra-epicondylar ridge of humerus I: Dorsal aspect of base of 2nd metacarpal	Radial Nerve	– Extend wrist – Abduct wrist	Radial Nerve Test, ECRL Strength Test, ECRL Length Test
Extensor Carpi Radialis Brevis	O: Lateral epicondyle of humerus I: Dorsal aspect of base of 3rd metacarpal	Deep Branch of Radial Nerve	– Extends wrist – Abducts wrist	Radial Nerve Test, Cozen’s Test, Mill’s Test
Extensor Digitorum	O: Lateral epicondyle of humerus I:Extensor expansions of medial 4 digits	Posterior Interosseous Nerve	– Extends medial four fingers	Maudsley’s Test
Extensor Digiti Minimi	O: Lateral epicondyle of the humerus I:Extensor expansion of 5th finger	Posterior Interosseous Nerve	– Extends 5th finger	EDM Strength and Length Tests
Extensor Carpi Ulnaris	O: Lateral epicondyle of the humerus I: Dorsal aspect of base of 5th metacarpal	Posterior Interosseous Nerve	– Extends wrist – Adducts wrist	ECU Strength and Length Tests
Adductor Pollicis Longus	O: Posterior surface of proximal half of ulna and radius I:Base of 1st metacarpal	Posterior Interosseous Nerve	– Abducts thumb – Extends thumb	Froment’s Sign
Extensor Pollicis Longus	O: Posterior surface of middle third of ulna and interosseous membrane I: Dorsal aspect of base of distal phalanx of thumb	Posterior Interosseous Nerve	– Extends distal phalanx of thumb	EPL Strength and Length Tests
Extensor Pollicis Brevis	O: Posterior surface of distal third of radius and interosseous membrane I: Dorsal aspect of base of proximal phalanx of thumb	Posterior Interosseous Nerve	– Extends proximal phalanx of thumb	Finkelstein Test

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