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Musculoskeletal

anatomy

QuestionAnswer
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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