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The serratus anterior () (Latin: ''serrare'' = to saw, referring to the shape, ''anterior'' = on the front side of the body) is a muscle that originates on the surface of the 1st to 8th ribs at the side of the chest and inserts along the entire anterior length of the medial border of the scapula. ==Structure== Serratus anterior normally originates by nine or ten slips (muscle branches) from either the first to ninth ribs or the first to eighth ribs. Because two slips usually arise from the second rib, the number of slips is greater than the number of ribs from which they originate. The muscle is inserted along the medial border of the scapula between the superior and inferior angles along with being inserted along the thoracic vertebrae. The muscle is divided into three named parts depending on their points of insertions:〔 #the serratus anterior superior is inserted near the superior angle #the serratus anterior intermediate is inserted along the medial border #the serratus anterior inferior is inserted near the inferior angle. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「serratus anterior muscle」の詳細全文を読む スポンサード リンク
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