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Muscles of the upper extremity

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Muscle
Innervation
Function
Blood supply
Biceps brachii   musculocutaneous n.   flexes arm at elbow joint; MAIN SUPINATOR OF FOREARM (when elbow flexed); weak flexor of shoulder joint (long head)   brachial a.  
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Coracobrachialis   musculocutaneous n.   flexes arm (at elbow joint); weak adductor of arm   brachial a.  
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Brachialis   musculocutaneous n.   MAIN FLEXOR OF FOREARM (when elbow flexed); supinates forearm   brachial a.  
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Triceps brachii   radial n.   extends forearm at elbow (MAIN EXTENSOR OF ELBOW)   profundi brachii a. (deep brachial a.)  
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Pronator Teres   median n.   pronates and flexes forearm   "ulnar a., anterior ulnar recurrent a."  
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Flexor Carpi Radialis   median n.   flexes and aBducts hand at wrist   ulnar a.  
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Flexor Carpi Ulnaris   ulnar n.   flexes and adducts hand at wrist   muscular branches of ulnar a.  
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Palmaris Longus (often absent)   median n.   flexes hand at wrist; tightens palmar aponeurosis   muscular branches of ulnar a.  
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Flexor Digitorum Superficialis   median n.   flexes middle phalanx of 2-5 fingers and hand; flexes MCP and wrist joints   muscular branches of ulnar a.  
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Pronator Quadratus   median n.   primary mover to PRONATE FOREARM   anterior interosseus a.  
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Flexor Pollicis Longus   median n.   flexes distal phalanx of thumb   anterior interosseus a.  
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Flexor Digitorum Profundus   medial half: ulnar n.; lateral half: median n.   flexes distal phalanx of 2-5 fingers; flexes MCP and wrist joints   muscular brances of ulnar a.; anterior interosseus a. (from ulnar a.)  
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Brachioradialis   radial n.   flexes forearm at elbow (only one in posterior)   radial recurrent a.  
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Extensor Carpi Radialis Longus   radial n.   extends and aBducts hand at wrist   radial a.  
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Extensor Carpi Radialis Brevis   deep branch of radial n.   extends and aBducts hand at wrist   radial a.  
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Extensor Digitorum   deep branch of radial n.   extends fingers and hand   interosseus recuurent a.  
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Extensor Digiti Minimi   deep branch of radial n.   extends MCP & IP joints of little finger   interosseus recuurent a.  
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Extensor Carpi Ulnaris   deep branch of radial n.   extends and adducts hand at wrist   ulnar a.  
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Anconeus   radial n.   extends elbow (along with triceps brachii m.)   interosseus recuurent a.  
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ABductor Pollicis Longus   deep branch of radial n.   aBducts and extends thumb   posterior interosseus a.  
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Extensor Pollicis Longus   deep branch of radial n.   extends distal phalanx of thumb   posterior interosseus a.  
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Extensor Pollicis Brevis   deep branch of radial n.   extends MCP joint of thumb   posterior interosseus a.  
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Extensor Indicis   deep branch of radial n.   extends MCP joint of index finger   posterior interosseus a.  
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Supinator   deep branch of radial n.   MAIN SUPINATOR OF FOREARM   interosseus recurrent a.  
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ABductor Pollicis Brevis   (recurrent branch of) median n.   aBducts thumb   superficial palmar branches of radial a.  
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Flexor Pollicis Brevis   (recurrent branch of) median n.   flexes MCP joint of thumb   superficial palmar branches of radial a.  
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Opponens Pollicis   (recurrent branch of) median n.   pulls thumb medially & forward across palm   superficial palmar branches of radial a.  
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ABductor Digiti Minimi   (deep branch of) ulnar n.   aBducts little finger   ulnar a.  
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Flexor Digiti Minimi   (deep branch of) ulnar n.   flexes little finger at MCP joint   ulnar a.  
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Opponens Digiti Minimi   (deep branch of) ulnar n.   brings 5th metacarpal bone towards thumb   ulnar a.  
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Adductor Pollicis   (deep branch of) ulnar n.   adducts thumb   deep palmar arterial arch  
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Lumbricals   lateral 2: median n.; medial 2: ulnar n.   flexes fingers at MCP joints; EXTENDS FINGERS AT IP JOINTS(with interossei)   superficial palmar arterial arch  
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Dorsal Interossei mm.   (deep branch of) ulnar n.   aBducts fingers from 3rd finger   dorsal & palmar metacarpal a. (of deep palmar arch)  
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Palmar Interossei mm.   (deep branch of) ulnar n.   adducts fingers toward 3rd finger   palmar metacarpal a. (of deep palmar arch)  
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Palmaris Brevis   (superficial branch of) ulnar n.   improves palmar grip (by wrinkling skin and deepening hollow of palm); covers/protects ulnar n. and a.   ulnar a.  
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Pectoral Major   medial and lateral pectoral ns.   adducts and medially rotates arm   pectoralis branch of thoracoacromial a.; lateral thoracic a. (lesser supply)  
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Pectoral Minor   medial pectoral n.   pulls shoulder down and forward (protraction)   lateral thoracic a.  
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Serratus Anterior   long thoracic n.   rotates scapula and pulls scapula around thoracic cage   lateral thoracic a.  
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Subclavius   nerve to subclavius m.   anchors and depresses the clavicle   clavicular branch of thoracoacromial trunk  
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