Ependyma

Ependyma

Infobox Anatomy
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Caption = Section of central canal of medulla spinalis, showing ependymal and neuroglial cells.
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MeshName = Ependyma
MeshNumber = A08.186.211.276.460

Ependyma is the thin epithelial membrane lining the ventricular system of the brain and the spinal cord. Ependyma is one of the four types of neuroglia in the central nervous system. It is involved in the production of cerebrospinal fluid (CSF).

Ependymal Cells

The ependyma is made up of ependymal cells. These are the epithelial cells that line the CSF-filled ventricles in the brain and the central canal of the spinal cord. The cells are cuboidal/columnar. Their apical surfaces are covered in a layer of cilia, which circulate CSF around the central nervous system. Their apical surfaces are also covered with microvilli, which absorb CSF. Within the brain's ventricles, a population of modified ependymal cells and capillaries together form a system called the choroid plexus, which produces the CSF.They are also Glial cells and CSF producing cells.

Pathology

Ependymoma is a tumor of the ependyma. Inflammation of ependymal cells, or ependymitis, is a hallmark pathology of tertiary syphilitic infections.

tem cells

Jonas Frisén and his colleagues at the Karolinska Institute in Stockholm believe that ependyma is the prime candidate for the location of neural stem cells. [cite journal | author = Johansson CB, Momma S, Clarke DL, Risling M, Lendahl U, Frisen J | title = Identification of a neural stem cell in the adult mammalian central nervous system | journal = Cell | volume = 96 | issue = 1 | pages = 25–34 | year = 1999 | pmid = 9989494 | doi = 10.1016/S0092-8674(00)80956-3]

References

External links

* [http://missinglink.ucsf.edu/lm/ids_104_cns_injury/Response%20_to_Injury/EpendymalCells.htm Illustrations at ucsf.edu]
* [http://synapses.mcg.edu/atlas/2_2intro.stm Atlas at ]


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Look at other dictionaries:

  • ependyma — [ep en′di mə] n. [ModL, arbitrary use (by Rudolf Virchow (1821 1902), Ger pathologist) of Gr ependyma, an upper garment < ependyein, to put on over < epi , over + endyein < en , on + dyein, dip into, put on < IE base * deu , to sink… …   English World dictionary

  • Ependyma — Ep*en dy*ma, n. [NL., fr. Gr. ? an upper garment; epi upon + ? a garment; ? in + ? to put on.] (Anat.) The epithelial lining of the ventricles of the brain and the canal of the spinal cord; endyma; ependymis. [1913 Webster] || …   The Collaborative International Dictionary of English

  • Ependyma — (gr.), 1) Oberkleid; 2) (Ependytes), die Kutte der griechischen u. ägyptischen Mönche; 3) die feine, die Gehirnhöhlen überziehende Haut …   Pierer's Universal-Lexikon

  • Ependyma — (griech.), die seine die Gehirnhöhle und den Kanal der Medulla spinalis überziehende Haut. Das E. kann sich entzünden (Ependymitis), hypertrophieren und sich verdicken …   Meyers Großes Konversations-Lexikon

  • Ependyma — Ependyma, griech., die seine Haut, welche die Gehirnhöhlen überspinnt …   Herders Conversations-Lexikon

  • ependyma — ependymal, ependymary /euh pen deuh mer ee/, adj. /euh pen deuh meuh/, n. Anat. a membrane lining the canal of the spinal cord and the ventricles of the brain. [1870 75; < Gk epéndyma a covering, garment, equiv. to ependý(ein) to put on, over (ep …   Universalium

  • ependyma — The cellular membrane lining the central canal of the spinal cord and the brain ventricles. SYN: endyma. [G. e., an upper garment] * * * ep·en·dy·ma ep en də mə n an epithelial membrane lining the ventricles of the brain and the canal of the… …   Medical dictionary

  • Ependyma — ependima statusas T sritis gyvūnų anatomija, gyvūnų morfologija atitikmenys: lot. Ependyma ryšiai: platesnis terminas – centrinė nervų sistema …   Veterinarinės anatomijos, histologijos ir embriologijos terminai

  • Ependyma — ependima statusas T sritis gyvūnų raida, augimas, ontogenezė, embriologija atitikmenys: lot. Ependyma ryšiai: platesnis terminas – skilvelinė sritis …   Veterinarinės anatomijos, histologijos ir embriologijos terminai

  • ependyma — noun A thin epithelial membrane lining the ventricular system of the brain and the spinal cord …   Wiktionary

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