Muscle Action and Innervation

Beschreibung

MS
sara choe
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sara choe
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Zusammenfassung der Ressource

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Latissimus Dorsi A: adducts, medially rotates, & extends humerus N: Thoracodorsal n. (C6, C7, C8)
Levator Scapulae A: Elevates scapula & downwardly rotates glenoid N: Dorsal Scapular n. (C3, C4, C5)
Rhomboid Major A: Retract Scapula & downwardly rotates glenoid N: Dorsal Scapular n. (C5)
Rhomboid Minor A: Retract Scapula & downwardly rotates glenoid N: Dorsal Scapular n. (C5)
Deltoid A: (ant.) flexion & medial rotation of arm (middle) abduction of arm (post.) extension & lateral rotation of arm N: Axillary n. (C5, C6)
Supraspinatus A: Assists deltoid with 1st 15* of abduction N: Suprascapular n. (C4, C5, C6)
Infraspinatus A: Lateral rotation & holds humeral head in glenoid N: Suprascapular n. (C4, C5, C6)
Teres Minor A: Lateral rotation & holds humeral head in glenoid N: Axillary n. (C5, C6)
Subscapularis A: Medially rotates, adducts & hold humeral head in glenoid N: Subscapular n. (C5, C6, C7)
Teres Major A: Medially rotates & adducts shoulder N: Lower Subscapular n. (C5, C6)
Pectoralis Major A: (Clavicular head) flexes shoulder (Strenocostal head) extends humerus in flexed position (Together) adducts,medailly rotates humerus & draws scapula anteriorly and inferiorly N: Medial & Lateral Pectoral n. (clavicular: C5, C6) (sterno: C7, C8, T1)
Pectoralis Minor A: Stabilizes scapula by drawing scapula anteriorly and superiorly N: Medial Pectoral n. (C8, T1)
Subclavius A: Anchors and depressed clavicle N: Subclavian n. (C5, C6)
Serratus Anterior A: Protracts scapula, hold scapula to thoracic wall & rotates scapula upwards N: Long Thoracis n. (C5, C6, C7)
Biceps Brachii A: Flexes elbow & shoulder, supinates forearm, flexes forearm in supine (short head) resists dislocation of shoulder N: Musculocutaneous n. (C5, C6)
Brachialis A: Flexes elbow in all positions N: Musculocutaneous n. (C5, C6)
Coracobrachialis A: Flex and adduct shoulder & resists dislocation of shoulder N: Musculocutaneous n. (C5, C6, C7)
Triceps Brachii A: Extends elbow N: Radial n. (C6, C7, C8)
Anconeus A: Assist triceps in extension elbow, stabilizes elbow joint, & abducts ulna during pronation N: Radial n. (C7, C8, T1)
Pronator Teres A: Pronates & flexes forearm N: Median n. (C6, C7)
Flexor carpi radialis A: Wrist flexion and radial deviation N: Median n. (C6, C7)
Palmaris Longus A: Flexes wrist N: N: Median n. (C7, C8)
Flexor Carpi Ulnaris A: Flexes wrist & ulnar deviation N: Ulnar n. (C7, C8)
Flexor Digitorum Superficialis A: Flexes PIP joints of 4 fingers & flexes proximal phalanges at MCP joint N: Median n. (C7, C8, T1)
Flexor Digitorum Profundus A: Flexes DIP joints of 4 fingers & flexes wrist N: (Digits 2-3) Median n. (C8, T1) (Digits 4-5) Ulnar n. (C8, T1)
Flexor Pollicis Longus A: flexes thumb N: Median n. (C8, T1)
Pronator Quadratus A: Pronation N: Median n. (C8, T1)
Brachioradialis A: Weak elbow flexion N: Radial n. (C5, C6, C7)
Extensor Carpi Radialis Longus A: Extends & radial deviates wrist N: Radial n. (C6, C7)
Extensor Carpi Radialis Brevis A: Extends & radial deviates wrist active during fist clentch N: Radial n. (C7, C8)
Extensor Digitorum A: Extends 4 fingers at MCP & IP joints N: Radial n. (C7, C8)
Extensor Digiti Minimi A: extends 5th digit at MCP and IP joints N: Radial n. (C7, C8)
Extensor Carpi Ulnaris A: Extends & ulnar deviates writs N: Radial n. (C7, C8)
Supinator A: Supinates forearm N: Radial n. (C7, C8)
Abductor Pollicis Longus A: abducts thumb, extends thumb at carpometacarpal joint N: Radial n. (C7, C8)
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