Corpora arenacea
| Brain sand | |
|---|---|
| Details | |
| Latin | Corpora arenacea |
| Identifiers | |
| Code | TH H3.08.02.3.00007 |
| TA | Lua error in Module:Wikidata at line 744: attempt to index field 'wikibase' (a nil value). |
| TH | {{#property:P1694}} |
| TE | {{#property:P1693}} |
| FMA | {{#property:P1402}} |
| Anatomical terminology
[[[d:Lua error in Module:Wikidata at line 863: attempt to index field 'wikibase' (a nil value).|edit on Wikidata]]]
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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. Concentrations of "brain sand" increase with age, so the pineal gland becomes increasingly visible on X-rays over time, usually by the third or fourth decade. 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.[1] Recently, calcite deposits have been described as well.[2]
External links
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References
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External links
- Histology image: 14401loa – Histology Learning System at Boston University
- Histology image: 41_03 at the University of Oklahoma Health Sciences Center - "Pineal gland"
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