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27 Cards in this Set
- Front
- Back
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What is the origin of the deltoid?
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Lateral 1/3 of clavicle, acromion process and spine of scapula.
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What is the insertion of the deltoid?
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Deltoid tuberosity
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What is the action of the deltoid?
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All fibers: Abduct the shoulder
Anterior fibers: Flex the shoulder, Medially rotate the shoulder, Horizontally adduct the shoulder Posterior fibers: Extend the shoulder, Laterally rotate the shoulder, Horizontally abduct the shoulder |
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What is the origin of the latissimus dorsi?
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Spinous process of last 6 thoracic vertebrae, last 3-4 ribs, thoracolumbar aponeurosis, and posterior iliac crest
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What is the insertion of the latissimus dorsi?
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Crest of the lesser tubercle of the humerus.
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What is the action of the latissimus dorsi?
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Extend the shoulder
Adduct the shoulder Medially rotate the shoulder |
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What is the origin of the teres major?
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Lateral side of the inferior angle & lower half of the lateral border of the scapula.
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What is the insertion of the teres major?
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Crest of the lesser tubercle of the humerus
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What is the action of the teres major?
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Extend the shoulder
Adduct the shoulder Medially rotate the shoulder |
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What is the origin of the supraspinatus?
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Supraspinous fossa of the scapula.
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What is the insertion of the supraspinatus?
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Greater tubercle of the humerus.
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What is the action of the supraspinatus?
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Stabilizes the head of the humerus in the glenoid cavity.
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What is the origin of the infraspinatus?
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Infraspinous fossa of the scapula.
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What is the insertion of the infraspinatus?
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Greater tubercle of the humerus.
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What is the action of the infraspinatus?
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Stabilizes the head of the humerus in the glenoid cavity
Laterally rotate the shoulder Adduct the shoulder Extend the shoulder Horizontally abduct the shoulder |
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What is the origin of the teres minor?
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Superior 1/2 of the lateral border of the scapula
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What is the insertion of the teres minor?
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Greater tubercle of the scapula
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What is the action of the teres minor?
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Stabilizes the head of the humerus in the glenoid cavity
Laterally rotates the shoulder Adducts the shoulder Extends the shoulder Horizontally abducts the shoulder |
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What is the origin of the subscapularis?
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Subscapular fossa of the scapula
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What is the insertion of the subscapularis?
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Lesser tubercle of the humerus
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What is the action of the subscapularis?
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Stabilizes the head of the humerus in the glenoid cavity
Medially rotates the shoulder |
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What is the origin of the pectoralis major?
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Medial 1/2 of the clavicle, sternum, and cartilage of ribs 1-6
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What is the insertion of the pectoralis major?
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Crest of the greater tubercle of the humerus
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What is the action of the pectoralis major?
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All fibers: Adduct the shoulder, Medially rotate the shoulder, Assist in elevating the thorax in forced inhalation (if arm fixed)
Upper fibers: Flex the shoulder, Horizontally adduct the shoulder Lower fibers: Extend the shoulder |
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What is the origin of the coracobrachialis?
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Coracoid process of the scapula
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What is the insertion of the coracobrachialis?
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Medial surface of mid-humeral shaft
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What is the action of the coracobrachialis?
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Flex the shoulder
Adduct the shoulder |
