Three Cases of Variation Muscle Bundles, that Arise from the Second Costa and Insert to the Medial Border of the Scapula Bilaterally, and that Passes Down ward in the Right Posterior Neck Region

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  • 両側にみられた第 2 肋骨より起始し, 肩甲骨内側縁に停止する異常筋束および右側後頸部の迷走筋束の 1 例
  • 両側にみられた第2肋骨より起始し,肩甲骨内側縁に停止する異常筋束および右側後頚部の迷走筋束の1例
  • リョウガワ ニ ミラレタ ダイ2 ロッコツ ヨリ キシ シ,カタ コウコツ ウチガワエン ニ テイシ スル イジョウキン ソク オヨビ ミギガワ ゴ ケイブ ノ メイソウキン ソク ノ 1レイ

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During the dissection practice for students in 1974, the following case of variation muscle bundles, that arise from the posterior part of the second costa and insert to the medial border of the scapula bilaterally, that passes downward in the region of posterior neck region, was observed. No.297 : Age about 40, Male. 1. The variation muscle bundle of the right side arises from angle of the right second costa, descending from medial to inferior, obliquely between the right serratus anterior and serratus posterior superior and insert to the medial border of the right scapula. 2. The left variation muscle bundle is same as the variation muscle bundle of the right side. 3. The migrated muscle bundle in the region of posterior neck arises from nuchae fascia between the right sternocleidomastoideus and the right splenius capitis, descending covered by the right levator scapulae, crossing obliquely between the right splenius capitis and the right levator scapulae, and inserts to the fascia on the right serratus posterior superior insertion.

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