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Musculoskeletal
anatomy
| Question | Answer |
|---|---|
| Coracobrachialis action | Flex the shoulder Adduct the shoulder |
| Corachobrachialis origin | coroid process of the scapula |
| Corachobrachialis insertion | medial surface of mid-humeral shaft |
| Corachobrachialis nerves | musculocutaneous C6, 7 |
| Latissimus Dorsi action | -Extend the shoulder -Adduct the shoulder -Medially rotate the shoulder |
| Latissimus Dorsi origin | Inferior angle of scapula, spinous processes of last six thoracic vertebra, last 3 or 4 ribs, thoracolubar aponeurosis and posterior iliac crest |
| Latissimus Dorsi insertion | Intertubercular groove of the humerus |
| Latissimus Dorsi nerves | Thoracodorsal C6,7,8 |
| Teres Major Action | -Extend the shoulder -Adduct the shoulder -Medially rotate the shoulder |
| Teres Major origin | Inferior angle and lower one-third of lateral border of the scapula |
| Teres Major Insertion | Crest of teh lesser tubercle of the humerus |
| Teres Major Nerve | Lower subscapular C5,6,7 |
| Teres Minor Action | -Laterally rotate the shoulder -Adduct the shoulder -Stabilize the head of humerus in glenoid activity |
| Teres Minor Origin | Upper two/thirds of lateral border of the scapula |
| Teres Minor Insertion | Greater tubercle of the humerus |
| Teres Minor Nerve | Axillary C5,6 |
| Infraspinatus Action | -Laterally rotate the shoulder -Adduct the shoulder -Stabilize the head of humerus |
| Infraspinatus Origin | Infraspinous fossa of the scapula |
| Infraspinatus Insertion | Greater tubercle of the humerus |
| Infraspinatus Nerve | Suprascapular C(4),5,6 |
| Supraspinatus Action | Abduct the shoulder Stabilize the head of humerus |
| Supraspinatus origin | Supraspinous fossa of the scapula |
| Supraspinatus insertion | Greater tubercle of the humerus |
| Supraspinatus nerve | Suprascapular C4,5,6 |
| Subscapularis Action | -Medially rotate the shoulder -Stabilize the head of humerus |
| Subscapularis Origin | Subscapular fossa of scapula |
| Subscapularis Insertion | Lesser tubercle of the humerus |
| Subscapularis Nerves | Upper and lower subscapular C5,6,7 |
| Trapezius Action | -Bilaterally: extend the head and neck -Unilateraly: Laterally flex the h&n to the same side, Rotate the h&n to the opposite side, Elevate the scapula, Upwardly rotate the scapula |
| Trapezius Origin | External occipital protuberance, medial portion of superior nuchal line of the occiput, ligamentum nuchae and spinous processes of C-7 through T-12 |
| Trapezius Insertion | Lateral one-third of clavicle, acromion and spine of the scapula |
| Trapezius Nerve | Spinal portion of cranial nerve XI and ventral ramus C2,3,4 |
| Rhomboid major Action | -Adduct the scapula -Elevate the scapula -Downwardly rotate the scapula |
| Rhomboid major Origin | Spinous processes of T-2 to T-5 |
| Rhomboid Major Insertion | Medial border of the scapula between the spine of the scapula and inferior angle |
| Rhomboid Major Nerve | Dorsal scapular C4,5 |
| Rhomboid Minor Action | -Adduct the scapula -Elevate the scapula -Downwardly rotate the scapula |
| Rhomboid Minor Origin | Spinous processes of C-7 and T-1 |
| Rhomboid Minoir Insertion | Upper portion of medial border of the scapula, across from the spine of the scapula |
| Rhomboid Minor Nerve | Dorsal scapular C4,5 |
| Serratus Anterior Action | -Abduct the scapula -Upwardly rotate the scapula -Depress the scapula -Hold the medial border of the scapula agaist the rib cage |
| Serratus Anterior Origin | -External surfaces of upper eight or nine ribs |
| Serratus Anterior Insertion | -Anterior surface of medial border of the scapula |
| Serratus Anterior Nerve | Long thoracic C5,6,7,8 |
| Levator Scapula Action | Unilateral: -Elevate the scapula -Downwardly rotate -Laterally flex -Rotate Bilaterally: Extend the head and neck |
| Levator Scapula Origin | Transverse process of first through fourth cervical vertebrae |
| Levator Scapula Insertion | Medial border of scapula, between superior angle and superior portion of spine of scapula |
| Levator Scapula of Nerve | Cervical 3,4, and Dorsal scapular C4,5 |
| Pectoralis Major Action | All fibers: -Adduct the shoulder -Medially rotate the shoulder Upper fibers: -Flex the shoulder -Horizontally adduct the shoulder Lower fibers: -Extend the shoulder |
| Pectoralis Major Origin | Medial half of the clavcle,, sternum and cartilage of first through sixth ribs |
| Pectoralis Major Insertion | Crest of greater tubercle of humerus |
| Pectoralis Major Nerve | Upper fibers: Lateral pectoral C5,6,7 Lower fibers: Lateral and medial pectoral C6,7,8,T1 |
| Pectoralis Minor Action | -Depress the scapula -Abduct the scapula -Downwardly rotate the scapula |
| Pectoralis Minor Origin | Third, Fourth, and Fifth ribs |
| Pectoralis Minor Insertion | Medial surface of coracoid process of the scapula |
| Pectoralis Minor Nerve | Medial pectoral, with fibers from a communicating brance of the lateral pectoral C(6),7,8,T1 |
| Biceps Brachii Action | -Flex the elbow -Supinate the forearm -Flex the shoulder |
| Biceps Brachii Origin | Short head: -Coracoid process of scapula Long head: -Supraglenoid tubercle of scapula |
| Biceps Brachii Insertion | Tuberosity of the radius and aponeurosis of the biceps brachii |
| Biceps Brachii Nerve | Musculocutatneous C5,6 |
| Triceps Brachii Action | All heads: -Exend the elbow Long head: -Extend the shoulder -Adduct the shoulder |
| Triceps Brachii Origin | Long Head: Infraglenoid tubercle of the scapula Lateral head: Posterior surface of proximal half of the humerus Medial Head: Posterior surface of distal half of the humerus |
| Triceps Brachii Insertion | Olecranon process of the ulna |
| Triceps Brachii | Radial C6,7,8,T1 |
Created by:
ckdabne
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