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PTS
shoulder and arms
| Term | Definition |
|---|---|
| Action of all fibers of deltoid | abduct the shoulder |
| Action anterior fibers deltoid | flex the shoulder, medially rotate shoulder, horizontally adduct the shoulder |
| Action of posterior fibers deltoid | extend the shoulder, laterally rot shoulder and horizontally abduct |
| origin of deltoid | lateral one third clavicle, acromian, and spine of scapula |
| insertion of deltoid | deltoid tuberosity |
| nerve innervated deltoid | axillary |
| Action of the upper fibers of trapezius | extend the neck bilaterally, and unilaterally laterally flex the head and neck on same side , rotate head and neck on opposite side, elevate the scapula and upwardly rotate scapula |
| action of middle fibers of trapezius | adduct the scapula and stabilize scapula |
| action of lower fibers of trapezius | depress the scapula, upwardly rotate scapula |
| origin of trapezius | external occipital protuberance, medial portion of superior nuchal line of occipt, ligamentum nuchae, and spinous process C7-T12 |
| insertion of trapezius | lateral one third of clavicle acromian and spine of scapula |
| nerve innervates trapezius | spinal portion of cranial nerve and ventral ramus |
| Action of latissimus dorsi | extend, adduct and medially rotate shoulder |
| insertion of latissimus dorsi | intertuberuclar groove of the humerus |
| Nerve innervates lat dorsi | thoracodorsal |
| Action of terms major | extend, adduct and med rotate the shoulder |
| origin of teres major | inferior angle and lower one third of lateral border |
| origin of lat dorsi | inferior angle of spine, spinous process of last 6 thoracic vertebrae , last 3-4 ribs, thorocumbular fascia, and posterior iliac crest |
| insertion of teres major | crest of lower tubercle of humerus |
| nerve that innervates teres major | lower sub scapular |
| action of supraspinatus | abduct the shoulder and stabalize |
| origin and insertion of supraspinatus | supraspinous fossa of scapula and greater tubercle of the humerus |
| nerve innervates supraspinatus | supra scapular |
| action of infraspinatus | laterally rotate, adduct shoulder and stabalize head of humerus to glenoid cavity |
| Origin and insertion of infraspinatus | infraspinatus fossa of scapula and greater tubercle of scapula , and greater tubercle of humerus |
| nerve innervate infraspinatus | supra scapular |
| Action of teres minor | laterally rotate, and adduct shoulder, stabalize head of humerus of glenoid cavity |
| Origin and insertion of teres minor | upper 2/3rds of the lateral border of the scapula |
| nerve that innervates teres minor | axillary |
| action of subscapularis | medially rotate shoulder and stabilize head of humerus in glenoid cavity |
| origin and insertion of subscapularis | sub scapular fossa of the scapula, and lesser tubercle of humerus |
| nerve that innervate subscapularis | upper and lower sub scapular |
| action of rhomboid major and minor | adduct, elevate, and downwardly rotate scapula |
| origin of rhomboid major | spinous process of T2-T5 |
| origin of rhomboid minor | spinous process c7- T1 |
| insertion of rhomboids major | medial border of scapula between the spine of the scapula and inferior angle |
| insertion of rhomboid minor | upper portion of medial border of the scapula, across the spine of scapula |
| nerve innervates rhomboids | dorsal scapular |
| action of Levator scapula | Unilaterally elevate, downwardly rotate scapula, unilaterally- laterally flex the head and neck and unilaterally rotate the head and neck to the same side. Bilaterally extend the head and neck |
| origin of Levator scapula | transverse process of first through fourth cervical vertebrae |
| insertion of Levator scapula | medial border of scapula, between superior angle and superior portion of spine of scapula |
| nerve innervates levator scapula | cervical, and dorsal scapular |
| action of Serratus anterior | with the origin fixed abduct, upwardly rotate, and depress the scapula. hold medial border of scapula against rib cage. with the scapula fixed may act to elevate the thorax during forced inhalation |
| origin of Serratus anterior | external surface of upper 8 or 9 ribs |
| insertion of the Serratus anterior | anterior surface of medial border of scapula |
| nerve innervates Serratus anterior | long thoracic |
| Action of all fibers pec major | adduct and medially rotate the shoulder, elevate the thorax during forced inhalation |
| action of upper fiber of pec major | flex the shoulder, horizontally adduct the shoulder |
| action of the lower fibers of pec major | extend the shoulder |
| origin of pec major | medial half of clavicle, sternum and cartilage of 1-6th rib |
| insertion of pec major | crest of greater tubercle of humerus |
| nerve innervate pec major | upper F - lateral pectoral Lower F- lateral and medial pectoral |
| Action of the pec minor | depress, abduct, and downwardly rotate the scapula. with fixed scapula elevates thorax during forced inhalation |
| origin of pec minor | 3,4,5 rib |
| insertion of pec minor | medial surface of coracoid process of scapula |
| nerve that innervates pec minor | medial pectoral and lateral pectoral |
| Action of subclavius | depress the clavicle and draw anteriorly, elevate the 1st rib, stabilize S/C joint |
| origin of subclavius | first rib and cartilage |
| insertion of subclavius | inferior surface of middle 1/3 of clavicle |
| nerve of subclavuis | subclavian |
| Action bicep brachii | flex the elbow, supinate the forearm, flex the shoulder |
| origin of biceps brachii | short head- coracoid process of scapula long head- supraglenoid tubercle of scapula |
| insertion of biceps brachii | tuberosity of the radius and aponeurosis of biceps |
| nerves of biceps | musculocutaneous |
| action of triceps brachii | all heads- extend the elbow long head- extend and adduct the shoulder |
| origins of tricep brachii | long head- infraglenoid tubercle of scapula lateral head- posterior surface of proximal half of humerus medial head- posterior surface of distal half of humerus |
| insertion of triceps brachii | olecranean process of ulna |
| nerve innervates tricep brachii | radial |
| Action of coracobrachialis | Flex the shoulder and adduct the shoulder |
| origin of coracobrachialis | coracoid process of scapula |
| insertion of coracobrachialis | medial surface of mid humeral shaft |
| nerve that innervates coracobrachialis | musculocutaneus |
Created by:
VICKICROW
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