GABAergic synapses in the antennal lobe and mushroom body of the locust olfactory system

To help elucidate the role of inhibitory feedback in the genesis of odour‐evoked synchronisation of neural activity, we investigated the distribution of γ‐aminobutyric acid (GABA)ergic synaptic terminals in the antennal lobes (AL) and mushroom bodies (MB) of the locust olfactory system. Electron‐microscopy, intracellular horseradish peroxidase labelling, and immunocytochemistry were combined to assess the distribution of GABAergic synapses, using established methods (Leitch and Laurent [1993] J. Comp. Neurol. 337:461–470).

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