Body of vertebra

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Body of vertebra
Corpusvertebrae.png
A typical thoracic vertebra, viewed from above (body visible at top center).
Gray84.png
A cervical vertebra. (Body visible at top center.)
Details
Latin Corpus vertebrae
Identifiers
Gray's p.96
Dorlands
/Elsevier
c_56/12260904
TA A02.2.01.002
FMA FMA:11945
Anatomical terms of bone

The body is the largest part of a vertebra, and is more or less cylindrical in shape. The central portion of a vertebra is called the centrum.[1]

Its upper and lower surfaces are flattened and rough, and give attachment to the intervertebral discs, and each presents a rim around its circumference.

In humans, in anterior view, the body is convex from side to side and concave from above downward. Behind, it is flat from above downward and slightly concave from side to side.

Its anterior surface presents a few small apertures, for the passage of nutrient vessels. On the posterior surface is a single large, irregular aperture, or occasionally more than one, for the exit of the basi-vertebral veins from the body of the vertebra.

Articular surfaces[edit]

The morphology of the anterior and posterior faces of a centrum, where it articulates with other vertebral bodies, partially determine the flexibility and strength of the vertebral column. There are several basic configurations. If both the anterior and posterior surfaces are flat, the vertebra is called "acoelous" or "amphiplatyan"; this type of vertebra is good for dealing with compressive forces. If both surfaces are concave, the vertebra is called "amphicoelous", and permits some motion across a wide range of directions. If the anterior surface is concave and the posterior surface is convex, the vertebra is "procoelous"; the opposite configuration is called "opisthocoelous". Articulation of the intervertebral discs results in less stretching of the spinal cord and thus gives procoelous and opisthocoelous vertebrae greater flexibility than acoelous and amphicoelous vertebrae. Finally, vertebrae with saddle-shaped articular surfaces are called "heterocoelous", which allows vertebrae to flex vertically and horizontally, while preventing twisting motions. Such vertebrae are found in the necks of birds and some turtles.[2]

Additional images[edit]

References[edit]

  1. ^ Dorland's (2012). Illustrated Medical Dictionary (32nd ed.). Elsevier Saunders. p. 329. ISBN 978-1-4160-6257-8. 
  2. ^ Kardong, Kenneth V. (2002). Vertebrates: comparative anatomy, function, evolution. McGraw-Hill. pp. 288–289. ISBN 0-07-290956-0. 

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

External links[edit]