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shoulder and arm
muscles of the shoulder and arm
| Question | Answer |
|---|---|
| what is the origin of the deltoid | Lateral one third of clavicle, acromion and spine of scapula |
| what is the insertion of the deltoid | deltoid tuberosity |
| actions for deltoid | all fibers: abduct the shoulder anterior fibers: flex, medially rotate, horizontally adduct posterior fibers: extend, laterally rotate, horizontally abduct |
| trapezius origin is | external occipital protuberance, medial portion of superior nuchal line of the occiput, ligamentum nuchae and spinous processes c-7 thru t-12 |
| insertion of trapezius | lateral one third of clavicle, acromion and spine of scapula |
| tapezzius actions are | extend head and neck, laterally flex head and neck to same side, rotate head and neck to opposite sides, upwardly rotate scapula middle fibers: adduct scapula, stabilize the scapula lower fibers: depress scapula, upwardly rotate scapula |
| latissimus dorsi orgin | inferior angle of scapula, spinous processes of last 6 thoracic vertebre, last 3 or 4 ribs, thoracolumbar aponeurosis and posterior iliac crest |
| where does the latissimus dorsi insert | intertubercular groove of humerous |
| actions of latissimus dorsi are | extend the shoulder, adduct the shoulder, medially rotate the shoulder |
| latissimus dorsi little helper is who | teres major |
| teres major origin is | inferior angle and lower one third of lateral border of the scapula insertion of the teres major is |
| crest of the lesser tubercle of the humerus | insertion of teres major |
| actions for teres major | extend shoulder, adduct the shoulder, medially rotate the shoulder |
| what is the origin for supraspinatus | supraspinous fossa of the scapula |
| what is the insertion of the supraspinatus | greater tubercle of the humeus |
| actions for supra | abduct the shoulder, stabilize the head of the humerus in glenoid cavity |
| infraspinatus origin | infraspinous fossa of the scapula |
| insertion of the infra | greater tubercle of the humerus |
| teres minor origin | upper 2/3 of lateral border of the scapula |
| insertion of teres minor | greater tubercle of humerus |
| subscapularis origin | subscapular fossa |
| insertion of the sub | lesser tubercle |
| action of sub | medially rotate shoulder, satablize head of humerous in glenoid cavity |
| teres minor actions | laterally rotate shoulder, adduce the shoulder, stabilize head of humerus |
| rhomboid major origin | spinous processes t-2 thru t5 |
| rhomboid minor origin | spinous processes c-7 thru t1 |
| actions of rhomboids | adduct the scapula, elevate the scapula, downwardly rotate scapula |
| major insertion for rhomboid | medial border of the scapula between the spine of the scapula and inferior angle |
| minor insertion rhomboid | upper portion of medial border of the scapula, across from the spine of the scapula |
| lavatory scapula orgins | transverse processes of the 1st thru 4th cervicle vertebre |
| lavatory scapula insertion | medial border of the scapula , btwn, superior angle and superior portion of the spine of the scapula |
| actions for levator scapula | elevate the scapula, downwardly rotate, laterally flex head and neck , rotate head and neck same side, extend head and neck |
| serratus anterior orgin | external of upper 8 and 9 ribs |
| insertion of serratus anterior | anterior surface of medial border of the scapula |
| actions of the serratus | abduct the scapula, upwardly rotate, depress , hold on medial border against ribcage |
| pectoralis major origin | medially half of clavicle, sternum and cartilage of 1st thru 6th ribs |
| insertion of pec major | crest of greater tubercle |
| actions for pec major | adduct the shoulder, medially rotate, assist to elevate the thorax suring forced inhalation, flex, horizontally adduct, extend |
| pec minor origin | 3,4,5 ribs |
| insertion of pec minor | medial surface of corqcoid orocess |
| actions for pec minor | depress scapula, abduct , downwarly rotate |
| subclavius origin | 1st rib ands cartilage |
| actions of subclavius | depress clavicle and draw in anteriorly, elevate first rib...assisted inhalation, stabilize sternoclavicular joint |
| insertion of subclavius | inferior surface of middle /3 of clavicle |
| bicep brachii origin short head | coracoid process |
| bicep brachii long head origin | supraglenoid tubercle |
| insertion of bicep | tuberosity of the radius and aponeurosis of the biceps brachii |
| actions of the bicep | flex elbow, supinate forearm, flex shoulder |
| triceps brachii orogin | long head infraglenoid tubercle of scapula short head poseterior surface of distal half the humerus |
| insertion of the tices | olecranon process of ulna |
| triceps actions | all: extend elbow long: extend shoulder, adduct |
| coracobrachii orogin | coracoid process of scapula |
| inserton of coracobracialis | medial surface of mid-humeral shaft |
| actions of cora | flex, adduct |
Created by:
miab
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