Astrocyte

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&nbsp;Astrocytes are a form of glial cell that are extremely abundant in the brain and central nervous system. Their name is derived from the Greek Astra, meaning star, in reference to their outward reaching processes.They surround and help to nourish the neurons. Astrocytes can be subdivided into two categories based upon cellular morphology and location: protoplasmic or fibrous<ref>Ramon Y, Cajal S (1909) Histologie du systeme nerveux de l’homme et des vertebres. Maloine, Paris</ref>. Protoplasmic astrocytes are found in grey matter and have a structure of many fine branches that form an overall globular shape&nbsp;<ref>Ramon Y, Cajal S (1909) Histologie du systeme nerveux de l’homme et des vertebres. Maloine, Paris</ref>. Fibrous astrocytes get their name from their thick, fibrous extensions and occur in the white matter&nbsp;<ref>Ramon Y, Cajal S (1909) Histologie du systeme nerveux de l’homme et des vertebres. Maloine, Paris</ref>. Both astrocytes form gap junctions between the neighbouring astrocytes, but protoplasmic surround and contact synapses while fibrous keep in contact with the nodes of Ranvier&nbsp;<ref>Peters A, Palay SL, Webster HD (1991) The fine structure of the nervous system, Third edn. Oxford University Press, New York</ref>  
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Astrocytes are a form of [[glial cell|glial cell]] that are extremely abundant in the [[brain|brain]] and [[central nervous system|central nervous system]]. Their name is derived from the Greek Astra, meaning star, in reference to their outward reaching processes. They surround and help to nourish the [[neurons|neurons]]. Astrocytes can be subdivided into two categories based upon cellular morphology and location: [[protoplasmic astrocytes|protoplasmic]] or [[fibrous astrocytes|fibrous]]<ref>Sonfroniew MV, Vinters HV. Astrocytes: Biology and pathology. Acta Neuropathologica. 2010;119(1): 7–35. doi 10.1007/s00401-009-0619-8</ref>. Protoplasmic astrocytes are found in grey matter and have a structure of many fine branches that form an overall globular shape<ref>Sonfroniew MV, Vinters HV. Astrocytes: Biology and pathology. Acta Neuropathologica. 2010;119(1): 7–35. doi 10.1007/s00401-009-0619-8</ref>. Fibrous astrocytes get their name from their thick, fibrous extensions and occur in the white matter<ref>Sonfroniew MV, Vinters HV. Astrocytes: Biology and pathology. Acta Neuropathologica. 2010;119(1): 7–35. doi 10.1007/s00401-009-0619-8s</ref>. Both astrocytes form [[Gap_junctions|gap junctions]] between the neighbouring astrocytes, but protoplasmic surround and contact synapses while fibrous keep in contact with the [[Nodes_of_Ranvier|nodes of Ranvier]]<ref>Peters A, Palay SL, Webster HD. The fine structure of the nervous system, Third edn. Oxford University Press, New York. 1991.</ref>.
 
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=== References  ===
  
 
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<references />
 
Sonfroniew MV, Vinters HV. Astrocytes: Biology and pathology. Acta Neuropathologica. 2010;119(1): 7–35. doi&nbsp;10.1007/s00401-009-0619-8
 
 
Peters A, Palay SL, Webster HD. The fine structure of the nervous system, Third edn. Oxford University Press, New York. 2006.&nbsp;
 

Latest revision as of 09:02, 19 November 2018

Astrocytes are a form of glial cell that are extremely abundant in the brain and central nervous system. Their name is derived from the Greek Astra, meaning star, in reference to their outward reaching processes. They surround and help to nourish the neurons. Astrocytes can be subdivided into two categories based upon cellular morphology and location: protoplasmic or fibrous[1]. Protoplasmic astrocytes are found in grey matter and have a structure of many fine branches that form an overall globular shape[2]. Fibrous astrocytes get their name from their thick, fibrous extensions and occur in the white matter[3]. Both astrocytes form gap junctions between the neighbouring astrocytes, but protoplasmic surround and contact synapses while fibrous keep in contact with the nodes of Ranvier[4].

References

  1. Sonfroniew MV, Vinters HV. Astrocytes: Biology and pathology. Acta Neuropathologica. 2010;119(1): 7–35. doi 10.1007/s00401-009-0619-8
  2. Sonfroniew MV, Vinters HV. Astrocytes: Biology and pathology. Acta Neuropathologica. 2010;119(1): 7–35. doi 10.1007/s00401-009-0619-8
  3. Sonfroniew MV, Vinters HV. Astrocytes: Biology and pathology. Acta Neuropathologica. 2010;119(1): 7–35. doi 10.1007/s00401-009-0619-8s
  4. Peters A, Palay SL, Webster HD. The fine structure of the nervous system, Third edn. Oxford University Press, New York. 1991.
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