Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
22 Cards in this Set
- Front
- Back
|
Trapezius: Superficial. Moves the pectoral girdle. Origin: superior nuchal line; occipital protruberance; ligamentum nachae; spinous process of C7-T12 Insertion: lateral 1/3 clavicle; spine of scapula; acromion of scapula Action: Retracts, elevates, depresses, and laterally rotates scapula; extends and bends the neck laterally |
|
|
Levator Scapulae: Origin: Transverse processes C1-C4 Insertion: Upper 1/4 of vertebral border of scapula Action: Elevates and slightly medially rotates scapula, extends and bends neck laterally |
|
|
Rhomboideus Minor: Deep to trapezius Origin: Lower part of ligamentum nauchae; Spinous process C7-T1 Insertion: Mid-portion vertebral border of scapula Action: Depresses shoulder, retracts (adduction) and slightly medially rotates scapula |
|
|
Rhomboideus Major: Inferior to minor and deep to trapezius Origin: Spinous process T2-T5 Insertion: Lower 1/2 of vertebral border of scapula Action: Retracts shoulder; slightly medially rotates scapula |
|
|
Pectoralis Minor: Origin: Superior margins of ribs (2) 3-5 Insertion: Coracoid process of scapula Action: Depresses and protracts and downwardly rotates scapula |
|
|
Subclavius: Small, cylindrical Origin: Medial portion of first rib Insertion: Subclavian groove Action: Stabilizes and depresses scapula |
|
|
Serratus Anterior: Origin: Anterior superior margins of first 8/9 ribs Insertion: Posterior medial border of scapula Action: abducts (protracts) and laterally rotates scapula |
|
|
Pectoralis Major: Superficial to minor Origin: Clavicle; sternum; costal cartilage of true ribs Insertion: Lateral lip of intertubercular groove of humerus Action: Flexes, adducts, and medially rotates arm |
|
|
Sternalis: -Runs parallel to the margin of sternum -Part of the pectoralis major or minor (this is theoretical, still not sure) -Present in 3-8% of population, usually unilateral -Function unknown |
|
|
Coracobrachialis: synergist to pectoralis major Origin: Coracoid process Insertion: Medial margin of shaft of humerus Action: Flexes and adducts arm |
|
|
Deltoid: Origin: Clavicle; acromion and spine of scapula Insertion: Deltoid tuberosity of humerus Action: Whole muscle abducts arm; in part may flex, extend, and rotate armm (medial and lateral) |
|
|
Clavopectoral or deltopectoral: Small triangular muscle near the deltoid, pectorals, and clavicle |
|
|
Latissimus Dorsi: On posterior side Origin: Spinous process of T7-T12; ribs 8-12; iliac crest; thoraculumbar fascia Insertion: Intertubercular groove of humerus Action: Extends, adducts, medially rotates arm, draws should backward and downward |
|
|
Rotator Cuff: has 4 scapulohumeral muscles 1) supraspinatus- superior to scapular spine 2) Infraspinatus- Inferior to scapular spine 3) Teres minor- on lateral border of scapular spine 4) Subscapularis- on anterior side of humerus Form multitendonous cuff around glenohumeral joint providing stability |
|
|
Supraspinatus: Part of rotator cuff Origin: Supraspinous fossa Insertion: Superior portion of greater tubercle Action: Abducts arm (10-15 degrees) |
|
|
Infraspinatus: Inferior to supraspinatus (part of rotator cuff) Origin: Infraspinous fossa of scapula Insertion: Posterior mid portion of greater tubercle of humerus Action: Laterally rotates arm; may assist in adduction |
|
|
Teres Minor: Inferior to infrasinatus (part of rotator cuff) Origin: Axillary border of scapula Insertion: Posterior inferior portion of greater tubercle of humerus Action: Adducts and laterally rotates arm |
|
|
Subscapularis: Anterior (part of rotator cuff) Origin: Subscapular fossa Insertion: Lesser tubercle Action: Adducts and medially rotates arm |
|
|
Teres Major: Inferior to teres minor Origin: dorsal surface of inferior angle of scapula Insertion: Medial lip of intertubercular groove Action: Extends, adducts, medially rotates arm |
|
|
Biceps Brachii: Long head origin: supraglenoid tubercle of scapula Short head origin: Coracoid process of scapula Insertion: Radial tuberosity and bicipial aponeurosis Action: Flexes and supinates forearm; flexes arm |
|
|
Brachialis: Fusiform, anterior aspect of humerus. Underneath biceps brachii Origin: Distal 1/2 anterior surface of humerus Insertion: coronoid process and tuberosity of ulna Action: Flexes forearm |
|
|
Triceps Brachii: Fusiform with 3 heads Long Head Origin: Infraglenoid tubercle of scapula Lateral head Origin: Proximal humerus above radial groove Medial Head Origin: Posterior humerus below radial groove Insertion: Elecranon process of ulna Action: Extends forearm; long head extends and adducts arm |
