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Back Muscles

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Question
Answer
Where is Triangle of Auscultation located?   Upper border of latissimus dorsi, lateral border of trapezius, medial border of scapula Floor is formed by rhomboid major  
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Where is the lumbar triangle located?   Formed by the iliac crest, latissimus dorsi, and external oblique abdominal muscle Floor is formed by internal oblique abdominal muscle  
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Where is the Occipital Artery?   Arises from carotid artery, runs deep to the SCM, lies on obliquus capitis superior and semispinalis capitis  
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What does the Occipital Artery do?   Pierces the trapezius, is accompanied by the greater occipital nerve and supplies the scalp in the occipital region  
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What are the superficial muscles of the back?   Trapezius, levator scapulae, rhomboid minor, rhomboid major, latissimus dorsi, serratus posterior superior, serratus posterior inferior  
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Origin of Trapezius?   occipital bone, nuchal line, SP of C7-T12  
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insertion of trapezius?   Lat 1/3 of clavicle, acromion & spine of scapula  
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Action of trapezius?   Elevates, retracts, depresses and rotates scapula  
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Innervation of trapezius?   Spinal Accessory n. (C3-C4)  
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Origin of latissimus dorsi?   SP of T& to sacrum, thoracolumbar fascia, iliac crest, ribs 10-12  
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Insertion of latissimus dorsi?   Intertubercular groove of humerus  
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Action of latissumus dorsi?    
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