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Muscle Origins, Insertions, Actions, & Innervations (Arm, Elbow, Forearm, and Hand)

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cetusili's version from 2017-02-18 19:31

Elbow Muscles Innervated by the Musculocutaneous Nerve

Question Answer Column 3 Column 4 Column 5
Biceps BrachiLong head, supraglenoid tubercle of scapula; Short head, coracoid process of scapulaRadial tuberosityElbow flexion, forearm supinationMusculocutaneous Nerve C5, C6
BrachialisDistal 1/2 of anterior humerusCoronoid process, Ulnar tuberosity of UlnaElbow flexionMusculocutaneous Nerve C5, C6
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Elbow Muscles Innervated by the Radial Nerve

Question Answer Column 3 Column 4 Column 5
BrachioradialisLateral supracondylar ridge of the humerusStyloid process of radiusElbow flexionRadial Nerve C5, C6
TricepsLong head- Infraglenoid tubercle; Lateral head- Inferior to greater tubercle on humerus; Medial head- Posterior surface of humerus,Olecranon processElbow extensionRadial Nerve C6, C7
AnconeusLateral epicondyleOlecranon fossaAssists elbow extensionRadial Nerve C6, C7
SupinatorLateral epicondyle of humerusProximal radiusForearm supinationRadial Nerve C6
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Wrist Muscles Innervated by the Radial Nerve

Question Answer Column 3 Column 4 Column 5
Extensor Carpi Radialis LongusSupracondylar ridgeBase of 2nd metacarpalWrist extension, radial deviationRadial Nerve C6, C7
Extensor Carpi Radialis BrevisLateral epicondyleBase of 3rd metacarpalWrist extensionRadial Nerve C6, C7
Extensor Carpi UlnarisLateral epicondyleBase of 5th metacarpal Wrist extension, ulnar deviationRadial Nerve C6, C7, C8
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Finger Muscles Innervated by the Radial Nerve

Question Answer Column 3 Column 4 Column 5
Extensor DigitorumLateral epicondyleDistal phalanx of 2 -5 fingersExtends all joints of fingersRadial Nerve C6, C7, C8
Extensor IndicisDistal ulnaDistal phalanx of 2 fingerExtends all joints on 2 fingerRadial Nerve C6, C7, C8
Extensor Digiti MinimiLateral epicondyleDistal phalanx of 5 fingerExtends all joints of 5 fingerRadial Nerve C6, C7,C8
Abductor Pollicis LongusRadius, interosseous membrane, ulnafirst metacarpalAbducts thumbRadial Nerve C6, C7
Extensor Pollicis BrevisPosterior distal radiusProximal phalanx of thumbExtends MP of thumbRadial Nerve C6, C7
Extensor Pollicis LongusPosterior ulna, interosseous membraneDistal phalanx of thumbExtends MP and IP joints of thumbRadial Nerve C6, C7, C8
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Elbow Muscles Innervated by the Medial Nerve

Question Answer Column 3 Column 4 Column 5
Pronator TeresMedial epicondyle of humerusRadius Forearm pronationMedian Nerve C6, C7
Pronator QuadratusDistal fourth of ulnaDistal fourth of radiusForearm pronationMedian Nerve C8, T1
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Wrist Muscles Innervated by the Medial Nerve

Question Answer Column 3 Column 4 Column 5
Flexor Carpi RadialisMedial epicondyleBase of 2nd and 3rd metacarpalsWrist flexion, radial deviationMedian Nerve C6, C7
Palmaris LongusMedial epicondylePalmar fasciaAssists wrist fuctionMedian Nerve C6, C7
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Finger Muscles Innervated by the Medial Nerve

Question Answer Column 3 Column 4 Column 5
Flexor Digitorum SuperficialisCommon flexor tendon, coranoid process, and radiusmiddle phalanx of fingersflexes MP and PIP jointsMedian Nerve C7, C8, T1
Flexor Pollicis LongusRadiusDistal phalanx of thumbflexes all joints of thumbMedian Nerve C8, T1
Flexor Pollicis BrevisTrapezium ad flexor retinaculumProximal phalanx of thumbFlexes CMC amd MCP of thumbMedial Nerve C6, C7
Opponens PollicisTrapezium and flexor retinaculum1st metacarpalOpposes thumb (CMC)Median nerve C6, C7
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Elbow Muscles Innervated by the Ulnar Nerve

Question Answer Column 3 Column 4 Column 5
Flexor Carpi UlnarisMedial epicondylePisiform, base of 5th metacarpalWrist flexion, ulnar deviationUlnar Nerve C8, T1
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Finger Muscles Innervated by the Ulnar Nerve

Question Answer Column 3 Column 4 Column 5
Flexor Digitorum ProfundusUpper 3/4 of ulnaDistal phalanx of fingersflexes all joints of fingersMedian and Ulnar Nerve C8, T1
LumbricalsTendon of flex. digit. profundusTendon of ext. digit. m.flex the MCP while extending PIPs & DIPS1st & 2nd- Medial 3rd & 4th Ulnar C6, C7, C8
Adductor PollicisCapitate, base of 2nd metecarpal, palmer surface of 3rd metacarpalbase of proximal phalanx of thumbAdducts thumbUlnar nerve C8, T1
Deep Branch
Dorsel InterosseiAdjacent metacarpalsbase of proximal phallanxAbducts fingers at MCPUlnar nerve C8, T1
Palmer Interossei1st, 2nd, 4th, & 5th metacarpalsbase of respective proximal phallanxAdducts fingers at MCPUlnar nerve C8, T1
Flexor Digiti MinimiHamate & Flex. retin.base of proximal phallanx of 5th fingerflexes CMC & MCP of 5th fingerUlnar Nerve C8, T1
Abductor Digiti MinimiPisiform & tendon of Flex. Carpi UlnarisProximal phallanx of 5th fingerAbducts MCP of 5th fingerUlnar Nerve C8, T1
Opponens Digiti MinimiHamate & Flex. retin.5th metacarpalOpposses 5th finger at CMCUlnar Nerve C8, T1
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