Grå substans

Grå substans betegner områder i hjernen og ryggmargen som hovedsakelig består av nerveceller.[1] Substansen er en viktig del av sentralnervesystemet. Den består av nevronale cellekropper, neuropil (dendritter, myeliniserte og umyleiniserte aksoner), gliaceller (astroglia og oligodendrocytter) og kapillarblodårer. Fargen til grå substans i levende vev er gråbrun, og skyldes kapillærblodårer og nevronale cellekropper.

Grå substans finner man på overflaten av de to hjernehalvdelene, overflaten av lillehjernen og dypt i storehjernen.

Se også

Referanser

  1. ^ Jansen, Jan. (2019, 25. januar). grå substans. I Store medisinske leksikon. Hentet 12. august 2019 fra https://sml.snl.no/gr%C3%A5_substans


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