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sternal angle : ウィキペディア英語版
sternal angle

The sternal angle (also known as the angle of Louis or manubriosternal junction) is the synarthrotic joint formed by the articulation of the manubrium and the body of the sternum.
The sternal angle is a palpable clinical landmark in surface anatomy.
==Anatomy==
The sternal angle, which varies around 162 degrees in males, marks the approximate level of the 2nd pair of costal cartilages, which attach to the second ribs, and the level of the intervertebral disc between T4 and T5.〔 In clinical applications, the sternal angle can be palpated at the T4 vertebral level.
The sternal angle is used in the definition of the thoracic plane. This marks the level of a number of other anatomical structures:
The angle also marks a number of other features:
:
* Carina of the trachea is deep to the sternal angle
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*
:
*Passage of the thoracic duct from right to left behind esophagus
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*
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* Ligamentum arteriosum
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*
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* Loop of left recurrent laryngeal nerve around aortic arch
The angle is in the form of a secondary cartilaginous joint (symphysis).

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「sternal angle」の詳細全文を読む



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