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The protoplasmic astrocytes occupy defined territories within the CNS. Two adjacent astrocytes create their micro-anatomical domains (green and red). Only at the cells' peripheries do their processes overlap (yellow). Images represent x–y (large), x–z (bottom), and y–z (right) projections. Scale bar, 20 μm. Reprinted, with permission from13 and the Journal of Neuroscience (Copyright 2002 by the Society for Neuroscience).
