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Shoulder Girdle

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Term
Definition
Upper Trapezius- Origin   Occipital bone, nuchal ligament on upper cervical spinous processes  
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Upper Trapezius- Insertion   Lateral 1/3 of clavicle; medial aspect of acromion process of scapula  
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Upper Trapezius- Nerve innervation   Spinal accessory nerve (cranial nerve XI); C3-C4 sensory component  
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Upper Trapezius- Action   *Scapular elevation *Upward rotation  
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Middle Trapezius- Origin   Spinous processes of C7-T3  
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Middle Trapezius- Insertion   Scapular spine  
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Middle Trapezius- Nerve Innervation   Spinal accessory nerve (cranial nerve XI); C3-C4 sensory component  
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Middle Trapezius- Action   Scapular retraction  
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Lower Trapezius- Origin   Spinous processes of middle & lower thoracic vertebrae  
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Lower Trapezius- Insertion   Base of scapular spine  
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Lower Trapezius- Nerve innervation   Spinal accessory nerve (cranial nerve XI); C3 & C4 sensory component  
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Lower Trapezius- Action   *Scapular depression & upward rotation  
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Levator Scapula- Origin   Transverse processes of C1-C4  
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Levator Scapula- Insertion   Superior part of vertebral border of scapula  
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Levator Scapula- Nerve Innervation   C3, C4, & dorsal scapular nerve (C5)  
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Levator Scapula- Action   *Scapular elevation *Downward rotation  
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Rhomboid- Origin   Major: Spinous processes of T2- T5 Minor: Ligamentum nuchae & spinous processes of C7 & T1  
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Rhomboid- Insertion   Major: Vertebral border of scapula from inferior to scapular spine to inferior angle Minor: Vertebral border of scapula; adjacent to scapular spine  
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Rhomboid- Nerve Innervation   Dorsal scapular nerve (C5)  
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Rhomboid- Action   *Scapular retraction, elevation, & downward rotation  
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Serratus Anterior- Origin   Lateral surface of upper 8 ribs  
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Serratus Anterior- Insertion   Anterior surface of vertebral border of scapula  
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Serratus Anterior- Nerve Innervation   Long thoracic nerve (C5,6,7)  
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Serratus Anterior- Action   *Scapular protraction & upward rotation  
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Pectoralis- Origin   Anterior surface of 3rd -5th ribs  
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Pectoralis- Insertion   Coracoid process of scapula  
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Pectoralis- Nerve Innervation   Medial pectoral nerve (C8, T1  
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Pectoralis- Action   *Scapular depression *Protraction *Downward rotation Anterior tilt of scapula  
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