GABA-activated astrocytes modulate neuronal activity. Summary of the astrocytic response to GABA and the consequent signalling to neurons; dotted arrows refer to contradictory observations or limited brain regions (see §§1 and 2). Glut, glutamate; Ado, adenosine; HD, heterosynaptic depression; tHD, transient heterosynaptic depression; IPSCs, inhibitory postsynaptic currents; EPSCs, excitatory postsynaptic currents; GATs, GABA transporters; NCX, Na+ Ca2+ exchanger.