For the manubrium of the eardrum, see
eardrum. For the manubrium of the jellyfish, see
jellyfish.
The manubrium (from Latin manubrĭum, "a handle") or manubrium sterni is the broad, upper part of the sternum. Located ventrally with a quadrangular shape, wider superiorly and narrower inferiorly, it articulates with the clavicles and the first two ribs.
[edit] Features
[edit] Borders
The superior border is the thickest and presents at its center the jugular or presternal notch; on either side of the notch is an oval articular surface, directed upward, backward, and lateralward, for articulation with the sternal end of the clavicle. The inferior border, oval and rough, is covered in a fresh state with a thin layer of cartilage for articulation with the body. The lateral borders are each marked above by a depression for the first costal cartilage, and below by a small facet, which, with a similar facet on the upper angle of the body, forms a notch for the reception of the costal cartilage of the second rib. Between the depression for the first costal cartilage and the demi-facet for the second is a narrow, curved edge, which slopes from above downward and medialward.
[edit] Additional images
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Sternoclavicular articulation. Anterior view.
[edit] External links
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.
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General structures
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T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12
costal facets ( superior, inferior, transverse) · Uncinate process of vertebra
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| Thoracic skeleton |
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specific ribs ( 1, 2, 9, 10, 11, 12, true – 1–7, false – 8–12, floating – 11–12) · parts ( Angle, Tubercle, Costal groove, Neck, Head)
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