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Nature 457, 675-677 (5 February 2009) | doi:10.1038/457675a; Published online 4 February 2009

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Neuroscience: Glia — more than just brain glue

Nicola J. Allen1 & Ben A. Barres1

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Glia make up most of the cells in the brain, yet until recently they were believed to have only a passive, supporting role. It is now becoming increasingly clear that these cells have other functions: they make crucial contributions to the formation, operation and adaptation of neural circuitry.

How do glia differ from neurons?The defining characteristic of a neuron is its ability to transmit rapid electrical signals in the form of action potentials.

  1. Nicola J. Allen and Ben A. Barres are in the Department of Neurobiology, Stanford University School of Medicine, Stanford, California 94305-5125, USA.
    Email: njallen@stanford.edu
    Email: barres@stanford.edu

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