Manubrium

From Wikipedia, the free encyclopedia

For the manubrium of the eardrum, see malleus. For the manubrium of the jellyfish, see jellyfish.

Manubrium

Position of the manubrium (shown in red).

Sternoclavicular articulation. Anterior view. From top to bottom, clavicles, first ribs and manubrium.
Latin	Manubrium sterni
Gray's	p.120
TA	A02.3.03.002
FMA	FMA:7486

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 cartilages of the first pair of ribs.

Features

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.

Additional images

Position of manubrium (shown in red). Animation.
Shape of manubrium. Animation.
Posterior surface of sternum.
Lateral border of sternum.

External links

Wikimedia Commons has media related to Manubrium.

Look up manubrium in Wiktionary, the free dictionary.

18:st-0208 at the SUNY Downstate Medical Center

This article incorporates text from a public domain edition of Gray's Anatomy.

Bones of torso (TA A02.2,3, GA 2.96–128)

Vertebra

General structures	body of vertebra vertebral arch (pedicle, lamina, vertebral notch) foramina (vertebral, intervertebral) processes (transverse, articular/zygapophysis, spinous) spinal canal

Cervical vertebrae	Uncinate process of vertebra Transverse foramen Anterior tubercle Carotid tubercle Posterior tubercle C1 (lateral mass, anterior arch, posterior arch) C2 (dens) C3, C4, C5, C6 C7

Thoracic vertebrae	T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12 costal facets (superior, inferior, transverse) Uncinate process of vertebra

Lumbar vertebrae	L1, L2, L3, L4, L5 processes (accessory, mammillary)

Sacrum	Base: sacral promontory ala of sacrum Lateral surface: sacral tuberosity pelvic surface (anterior sacral foramina) Dorsal surface: posterior sacral foramina median sacral crest medial sacral crest lateral sacral crest sacral canal (sacral hiatus)

Coccyx	Coccygeal cornu

Thoracic skeleton

Rib	specific ribs (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, True ribs, False ribs, Floating rib) parts (Angle, Tubercle, Costal groove, Neck, Head)

Sternum	Suprasternal notch Manubrium Sternal angle Body of sternum Xiphisternal joint Xiphoid process

Thoracic cage	Superior thoracic aperture Inferior thoracic aperture Intercostal space Costal margin Infrasternal angle

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noco/cong/tumr, sysi/epon, injr

proc, drug (M5)

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