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25 Cards in this Set
- Front
- Back
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Pectoralis major action?
origin? insertion? |
adducts, medially rotates humerus; flexes humerus.
medial onethird clavicle, anterior surface sternum. lateral lip of bicepital groove |
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Pectoralis minor origin? insertion? action?
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ribs 3-5. coracoid process. rotates scapula (tilts glenoid fossa inferiorly)
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Serratus anterior origin? insertion? action?
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external surface ribs 1-8. anterior surface medial border scapula. protracts scapula and fixes it against thorax
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Trapezius origin? insertion? action?
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external occipital protuberance, spinous processes C7-T12. lateral one third clavicle, acromion, spine of scapula. elevates (superior fibres) retracts (middle fibers) depresses scapula
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Rhomboideus major origin? insertion? action?
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spines of 2-5 thoracic vertebrae. medial border scapula, inferior to spine. retracts scapula and assists in holding it against thorax
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Rhomdoideus minor origin? insertion? action?
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spines of 7th cervical and 1st thoracic vertebrae. medial border scapula, level of spine to inferior angle. retracts scapula and assists in holding against thorax
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Latissimus dorsi origin? insertion? action?
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inferior to 6 thoracic vertebrae, iliac crest, inferior 3-4 ribs. intertubercular groove. extends, adducts, rotates humerus medially at shoulder joint; internal rotation
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Deltoid origin? insertion? action?
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lateral one third clavicle, acromion, spine scapula. deltoid tuberosity. abduction of humerus at shoulder joint, anterior flexion and medial rotation, extensor and lateral rotation (posterior)
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Supraspinatus origin? insertion? action?
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supraspinous fossa. greater tubercle. laterally rotates humerus, assists deltoid in abduction (0-15 degrees)
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Infraspinatus origin? insertion? action?
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infraspinous fossa. greater tubercle. abduction 0-15 degrees
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Teres minor origin? insertion? action?
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axiallry/lateral border. greater tubercle. abduction 0-15 degrees
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Subscapularis origin? insertion? action?
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subscapular fossa. lesser tubercle. medially rotates and adducts humerus
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Teres major origin? insertion? action?
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inferior angle scapula. intertubercular groove. adduction and medial rotation
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Coracobrachialis origin? insertion? action?
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coracoid process. middle one third medial aspect humerus. flex and adduct humerus
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Biceps brachii origin? insertion? action?
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short head: coracoid process, long head: supraglenoid tubercle. radial tuberosity. flexion of forearm, supinator when flexed
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Brachialis origin? insertion? action?
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distal half anterior surface humerus. coronoid process. main flexor
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Triceps brachii origin? insertion? action?
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long head: infraglenoid tubercle, lateral head: post. humerus superior to radial groove, medial head: post. humerus, inferior to radial groove. olecranon process. main extensor, stabilizes shoulder, adduction
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Pronator teres origin? insertion? action?
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medial epicondyle humerus and coronoid process ulna. mid-lateral radius. pronates forearm at radioulnar joint and weakly flexes forearm at elbow joint
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Flexor carpi radialis origin? insertion? action?
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medial epicondyle humerus. 2nd and 3rd metacarpal. flexes and abducts hand at wrist joint
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Palmaris longus origin? insertion? action?
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medial epicondyle. flexor retinaculum and palmar aponeurosis. weak flexion of hand at wrist
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What muscles attach at the medial epicondyle?
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Flexor carpi radialis, flexor carpi ulnaris, palmaris longus, pronator teres, flexor digitorum superficialis
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Flexor carpi ulnaris insertion? action?
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posterior border ulna. extends and abducts hand at wrist joint
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What is the nerve that innervates the Superficial layer of the forearm?
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medial nerve exception flexor carpi ulnaris = ulnar nerve
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Flexor digitorum superficialis origin? insertion? action?
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medial epicondyle, coronoid process ulna, ridge along margin of anterior surface of radius. bodies of middle phalanx of each finger. flexes middle phalanx of each finger at proximal interphalangeal joint, proximal phalanx of each finger at metacarpophalangeal joint, and hand at wrist joint
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Which muscles attach at the lateral epicondyle?
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Extensor carpi radialis brevis, extensor digitorum, extensor digiti minimi, extensor carpi ulnaris
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