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Corpora_arenacea
Corpora arenacea
Corpora arenacea (or brain sand) are calcified structures in the pineal gland and other areas of the brain such as the choroid plexus. Older organisms have numerous corpora arenacea, whose function, if any, is unknown. They are sometimes used as anatomical landmarks in radiological examinations.
Chemical analysis shows that they are composed of calcium phosphate, calcium carbonate, magnesium phosphate, and ammonium phosphate. . Recently, calcite deposits have been described as well .
Concentrations of "brain sand" are said to increase with age.
References
External links
- - "Pineal gland"
- Garma-Aviña A "Excretory plugs from the choroid plexus in the cerebrospinal fluid of dogs with neurological disease: possible role in the formation of corpora arenacea.". J Comp Pathol 123 (2-3): 146–51.
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Last updated on Saturday August 02, 2008 at 13:11:11 PDT (GMT -0700)
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This article is licensed under the GNU Free Documentation License.
Last updated on Saturday August 02, 2008 at 13:11:11 PDT (GMT -0700)
View this article at Wikipedia.org - Edit this article at Wikipedia.org - Donate to the Wikimedia Foundation
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