Clarification of the mechanisms to control odor-evoked responses using genetically manipulated mice with neuronal modifications.

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In this study, we found that specific neuronal circuits in the main olfactory system which start from distinct area on the dorsal-domain of the olfactory bulb regulate various social communication responses in addition to fear responses. Various kinds of genetically manipulated mice with partial depletions of the specific neuronal circuits in the main olfactory system were generated, and quantitative analysis systems for odor-evoked specific behaviors and emotions were constructed. From these results, we established the methods to study the neuronal mechanisms to regulate odor-evoked responses based on the functions of the specific neuronal circuits in the main olfactory bulb.