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17 Cards in this Set
- Front
- Back
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pec major origin
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anterior surface of the medial half of the clavicle and anterior surface of the sternum
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pec major insertion
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anterior-laterally on the intertubercular groove of the humerus
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pec major artery
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thoracromial trunk
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pec major innervation
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lateral pectoral nerve (from the lateral cord of the BP)
medial pect nerve (from the medial cord of the BP) |
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pec major actions (5)
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1. Flex the humerus (clavicle fibers)
2. Extend the humerus (sternocostal fibers) 3. adducts humerus 4. medially rotates humerus 5. downward rotation and depression of the scapula |
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pec minor origin
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ribs 3-5, near the costal cartilages
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pec minor insertion
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coracoid process of the scapula
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pec minor artery
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thoracromial trunk
lateral thoracic artery |
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pec minor innervation
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medial pectoral nerve
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pec minor action (2)
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1. depression and downward rotation of the scapula
2. protraction (abduction) of the scapula |
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serratus anterior origin
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ribs 1-8
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serratus anterior insertion
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medial border of the scapula
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serratus anterior artery
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lateral thoracic artery
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serratus anterior innervation
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long thoracic nerve
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serratus anterior action (3)
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1. protraction (abduction) of scapula
2. rotates scapula upward 3. holds scapula against body |
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deltopectoral triangle
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superior border = lateral clavical
medial border = pec major lateral border = deltoid cephalic vein runs through here to join axillary vein |
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winged scapula
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protrusion of scapula
when serratus anterior (long thoracic nerve) is paralyzed |
