The sternal angle is the angle formed by the junction of the manubrium and the body of the sternum[1] (the manubriosternal junction) in the form of a secondary cartilaginous joint (symphysis). This is also called the manubriosternal joint or Angle of Louis. The sternal angle is a palpable clinical landmark.
It marks the approximate level of the 2nd pair of costal cartilages and the level of the intervertebral disc between T4 and T5. It also marks approximately the beginning and end of the aortic arch, and the bifurcation of the trachea into the left and right main bronchi.
The angle is approximately 140 degrees.
See also
References
- ^ Dalley, Arthur F.; Moore, Keith L.. Clinically Oriented Anatomy. Hagerstown, MD: Lippincott Williams & Wilkins. ISBN 0-7817-5936-6.
External links
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Bones of torso |
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| Sternum |
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| Rib |
specific ribs ( 1, 2, 9, 10, 11, 12, false – 8–12, floating – 11–12) – parts ( Angle, Tubercle, Costal groove, Neck, Head)
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| General vertebral structures |
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| Cervical vertebrae |
C1 ( anterior arch, posterior arch, lateral mass), C2 ( dens), C3, C4, C5, C6, C7
anterior tubercle, posterior tubercle, foramen transversarium
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| Thoracic vertebrae |
T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12
costal facets ( superior, inferior, transverse)
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| Lumbar vertebrae |
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| Sacrum |
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| Coccyx |
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