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Origins, Insertions, Actions and Innervations of UE Muscles

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Muscle
Origin
Insertion
Innervation
Action
Upper Trapezius   external occipital protuberance medial 1/3 of superior nuchal line ligamentum nuchae spinous process of 7th cervical vertebrae   show spinal accessory CXI and ventral rami of C3,4.   scapular elevation upward rotation of scapula scapular retraction  
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Middle Trapezius   show superior border of spine of scapula   spinal accessory CXI and ventral rami, C3,4   scapular retraction and elevation  
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Lower Trapezius   spinous process of thoracic vertebrae 6-12   show spinal accessory CXI and ventral rami, C3, 4   scapular depression, retraction and upward rotation  
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Levator Scapulae   transverse process of cervical 1-4   show dorsal scapular C5, and ventral rami of C3,4   scapular elevation, downward rotation, and retraction  
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show Spinous process of thoracis 2-5   medial border of scapula from spine to inferior angle   dorsal scapular, C5   scapular retraction, elevation, downward rotation  
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Rhomboid Minor   lower part of ligamentum nuchae, spinous process of C7 and T1   medial border of capula at the root of the spine of the scapula   show scapular retraction, elevation and downward rotation  
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Deltoid   A: lateral 1/3 of clavicle, M: acromion process, P: inferior spine of scapula   deltoid tuberosity   Axillary, C5, 6   show
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Serratus Anterior   superior lateral surfaces of upper 8 or 9 ribs   costal surface of vertebral border along inferior angle of scapula   Long thoracic, C5,6,7.   show
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Subclavius   1st rib at the jct of costal cartilage   groove on inf. clavicle (btwn costoclavicular and conoid lig)   subclavian branch of brachial plexus, C5,6   show
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Pectoralis Minor   anterior surface of 3rd, 4th, 5th ribs   coracoid process of scapula   medial pectoral nerve from brachial plexus, C6, 7, 8   show
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show C: ant surface of med. 1/2 clavicle; S: sternum to 7th rib, cartilages of true ribs and aponeurosis of ext. obliques   lateral lip of the intertubercular sulcus of the humerus (bicipital groove); crest of greater tubercle   C:lateral pectoral C5, 6 S: lateral and medial pectoral, C7,8, T1.   flexion, adduction, horiz. flexion, medial rotation. S also extends flexed humerus  
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Latissimus Dorsi   show flat tendon that twists upon itself to insert into the intertubercular sulcus   Thoracodorsal from brachial plexus, C6,7,8   extends, retracts and medially rotates the humerus at the shoulder  
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Teres Major   dorsal surface of inferior angle of the scapula on lower 1/3 of scapular axillary border   intertubercular groove (medial lip)   show adducts and medially rotates humerus at the shoulder, extends shoulder  
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Infraspinatus   show post. aspect of greater tubercle   suprascapular, C5-6   lateral rotation of humerus, stabilization of joint.  
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supraspinatus   medial 2/3 of supraspinatus fossa   show suprascapular, C5-6   abduction of humerus, stabilization of joint.  
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teres minor   superior 2/3 of dorsal surface of axillary border of scapula   inf. aspect of greater tubercle   show lateral rotation of humerus; stabilization of head of humerus.  
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subscapularis   entire anterior surface of the subscapular fossa   show upper and lower subscapular, C5,6,7   medial rotation of the humerus, stabilization of joint  
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Coracobrachialis   show roughening in the medial shaft   musculocutaneous, C5-7   flexes arm at glenohumeral joint  
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show supraglenoid tubercle on scapula(long) and coracoid process (short)   radial tuberosity   musculocutaneous, C5-6   forearm flexion and supination  
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Brachialis   anterior aspect of the humerus and adjacent intermuscular septae   show musculocutaneous, C5-6 (and some C7 from Radial N.)   forearm flexion  
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Triceps Brachii   infraglenoid tubercle(long), superior 1/2 of post. humerus(lat), inferior 2/3 of post. humerus (medial)   show radial, C6-8   extension of forearm (long also adducts shoulder)  
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Anconeus   Posterior lateral epicondyle   lateral olecranon; upper 1/4 of post surface of ulna   show extends elbow (and stabilize during pronation)  
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Pronator Teres   medial epicondyle(humeral) and medial coronoid process (ulnar)   middle 1/3 lateral radius   show pronation and flexion  
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Flexor Carpi Radialis   medial epicondyle   show median, C6-7   flexion and radial deviation  
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Palmaris Longus   show palmar aponeurosis   median, C7-8   flexion at wrist  
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Flexor Carpi Ulnaris   medial epicondyle   posterior border of ulna   ulnar, C7-8 and T1   show
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Flexor Digitorum Superficialis   medial epicondyle and coronoid process(humeroulnar), oblique line of radius (radial)   4 tendons to base of middle phalanges   show wrist flexion, MCP jt and IP jt flexion  
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Flexor Digitorum Profundus   Anteromedial surface of ulna and anteromedial surface of interosseus membrane   palmar surface of distal phalynx   show flexes DIP, MP and wrist  
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Flexor Pollicus Longus   anterior surface of radius and radial 1/2 of interosseus   show median(ant. interosseus), C7-8   flexes IP of thumb/mp  
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Pronator Quadratus   linear ridge on distal anterior surface of ulna   show median nerve (ant. interosseus), C7-8   pronation  
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Brachioradialis   show lateral aspect of distal radius   radial, C5-6   flex neutral forearm (pronate/supinate to neutral)  
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show lateral epicondyle   posterior surface of 3rd metacarpal   deep radial, C7-8   extension and radial deviation  
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Extensor Digitorum   lateral epicondyle   show post. interosseus C7-8   extends fingers  
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Extensor Digiti Minimi   show PP of little finger   post. interosseus, C7-8   extends little finger  
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Extensor Carpi Ulnaris   lateral epicondyle and post. border of ulna   post. surface of 5th metacarpal   show extends and ulnarly deviates wrist  
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Supinator   show lateral surface of radius   Deep Radial, C6-7   supination  
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Abductor Pollucis Longus   prox. post ulna, radius, interosseus membrane   lateral base of 1st metacarpal   show abducts MCP jt at thumb  
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Extensor Pollucis Brevis   post. radius and post. interosseus membrane   proximal phalynx base   post. interosseus, C7-8   show
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Extensor Pollucis Longus   mid 1/3 of ulna and interosseus membrane   show post. interosseus, C7-8   Extends DIP  
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Extensor Indicis   Posterior ulna and interosseus membrane   show post. interosseus, C7-8   Extends phalanges of index  
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Extensor Carpi Radialis Longus   show dorsal surface of base of 2nd metacarpal   Radial, C6-7   wrist extension and radial deviation with coulpled with flexor carpi radialis)  
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