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origin insertions and actions - gym instructor

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Muscle of upper torso
Origin
Insertion
Action
Deltoid - anterior - lateral - posterior   clavicle and scapula   humerus   shoulder abduction - flexion - extension & rotation  
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Pectoralis major   clavicle, sternum and ribs   humerus   shoulder adduction (horizontal)  
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rhomboids major & minor (back between shoulder blades)   cervical and thoracic vertebrae   scapula   shoulder girdle retraction (squeeze shoulder blades together)  
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trapezius upper   base of skull and cervical vertebrae   clavicle and scapula   lateral flexion of the neck roation of the neck adduction of scapula rotation of scapula  
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trapezius middle   thoracic vertebrae   scapula   adducts scapula elevates scapula  
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trapezius lower   thoracic vertebrae   scapula   depresses scapula  
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supra.spinatus (rotator cuff)   scapula   humerus   assist deltoid in shoulder abduction  
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infran.spinatus (rotator cuff)   scapula   humerus   laterally rotates & adducts shoulder  
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teres major & minor (beneath rhomboids)   scapula   humerus   shoulder extension & adduction  
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pectoralis minor (front chest)   ribs   scapula   depresses scapula elevates ribs 3-5 during forced inspiration  
🗑


   

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Created by: allisonhearsum
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