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Cholinergic neurons innervate multiple layers in the main olfactory bulb but the precise circuitry of this input is not known. Here the authors show that VGLUT3+ cholinergic neurons selectively innervate deep short axon cells in specific layers and elicit robust monosynaptic GABAergic and nicotinic postsynaptic currents.
The transition from an odour being novel to being familiar in Drosophila Melanogaster involves dopaminergic modulation of the kenyon cell–α′3 mushroom body output neuron synapse in the fly mushroom body.
It is not known how mammals sense potentially life-threatening reductions in oxygen in the ambient air, but a novel mechanism has been found in mice that involves a novel subpopulation of olfactory sensory neurons that express the soluble guanylate cyclase GUCY1β2.