Gamma-aminobutyric acid (GABA)-containing neurons are capable of controlling network oscillations and their patterns in the widely divergent species. In the terrestrial slug, Limax valentianus, oscillatory activity of the procerebrum neurons is considered to encode the odor information. Previous studies showed that GABA is present in the central nervous system and may be involved in the control of neuronal activity of Limax. In the present study, we examined the effects of GABA on the generation of oscillatory activity in the procerebrum. The results suggest that the GABAergic synaptic transmission may be involved in the oscillatory neural network of the procerebrum.
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