do u know why does a physician ask the patient to raise his arm over his head in examination of the lower lobe of the lung , during auscultation at the back ?
answer : its because upon elevation of arm , which is called abduction ,carried out by both serratus anterior muscle and the rotation of scapula , the physician removes the lower angle of scapula and by that he clears the way for himself to auscultate the lower lobe of the lung clearly ,
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