Sternal angle
Sternal angle | |
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![]() Lateral border of sternum.
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![]() Anterior surface of sternum and costal cartilages. (Sternal angle not labeled, but visible at second costal cartilage.)
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Details | |
Latin | angulus sterni, angulus sternalis |
Identifiers | |
Dorlands /Elsevier |
a_42/12136357 |
TA | Lua error in Module:Wikidata at line 744: attempt to index field 'wikibase' (a nil value). |
TH | {{#property:P1694}} |
TE | {{#property:P1693}} |
FMA | {{#property:P1402}} |
Anatomical terminology
[[[d:Lua error in Module:Wikidata at line 863: attempt to index field 'wikibase' (a nil value).|edit on Wikidata]]]
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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.[1][2]
The sternal angle is a palpable clinical landmark in surface anatomy.
Anatomy
The sternal angle, which varies around 162 degrees in males,[3] 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.[2] 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:
Structures at the level of the thoracic plane
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The angle also marks a number of other features:
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- Carina of the trachea is deep to the sternal angle
- Passage of the thoracic duct from right to left behind esophagus
- Ligamentum arteriosum
- Loop of left recurrent laryngeal nerve around aortic arch
The angle is in the form of a secondary cartilaginous joint (symphysis).
History
The sternal angle is also called the angle of Louis after Antoine Louis
See also
References
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- ↑ RADIOGRAPHIC LANDMARKS OF THE UPPER MARGIN OF THE SUPERIOR VENA CAVA (SVC) IN CHILDREN. - Arai et al. 49 (Supplement 1): 32 - Canadian Journal of Anesthesia
- ↑ UAMS Department of Anatomy - Viscera of the Thorax
External links
- Anatomy photo:18:st-0212 at the SUNY Downstate Medical Center - "Thoracic Wall: Bones"