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In human anatomy, the levator claviculae is a very rare accessory and vestigial skeletal muscle in the posterior triangle of the neck. It originates on the transverse processes of the upper cervical vertebrae and is inserted in the lateral half of the clavicle. Though a supernumerary muscle〔 present in only 2–3% of all people, it is not an abnormality but a variant of normal human anatomy〔 with an atavistic character.〔 It has also been referred to as the omocervicalis, cleidocervicalis, and tracheloacromial muscle, with the variation in names indicating different sites of origin and insertion.〔 ==Structure== Its origin is on at least the third uppermost vertebrae, from where it courses inferiorly and laterally, lateral to the scalene and levator scapulae muscles but medial to the sternocleidomastoid muscle. Passing posteriorly to the latter muscle, it is inserted either to the middle of the clavicle or, more frequently, to the lateral third of the clavicle. It might also blend with the trapezius before its insertion. 〔 It has been reported to originate on the sixth cervical vertebra. 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「Levator claviculae muscle」の詳細全文を読む スポンサード リンク
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