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Schematic representation of the tripartite synapse. Left: astrocytes (green) are in close contact with blood vessels and synapses. Inset: in addition to postsynaptic receptors, neurotransmitters activate receptors expressed by astrocyte. This induces an increase in intracellular Ca2+ concentration, which triggers the release of gliotransmitters that interact with pre‐ and postsynaptic receptors
