Controlling Sniffing Rhythm and Odor Information Representation

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  • スニッフィングリズム制御と匂い情報表現(<特集>香り・人・システム2)
  • スニッフィングリズム制御と匂い情報表現
  • スニッフィングリズム セイギョ ト ニオイ ジョウホウ ヒョウゲン

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Sniffing, a voluntary inhalation of air through the nose, is an active sensing behavior strongly controlled depending on behavioral and stimulus context. Sniffing-coupled sub-threshold electrical activity is found in mitral/tufted cells in the rodent olfactory bulb (OB), and it strongly affects odor-evoked spatiotemporal patterns of their spikes, i.e., odor information representation. Here, using a biologically plausible neuron model, we examined how sub-threshold rhythmic activity (mimicking sniffing-coupled activity) affects onset latency of neuronal spike evoked by odor mimicking input. Simulation results indicate that the sub-threshold rhythmic activity makes input-latency relationship to be linear in wide range of input strength, and by changing temporal features of the sub-threshold activity, the input-latency relationship vary in a regular way. These imply that odor information representation in the OB might be easily and precisely controllable by changing the sniffing-coupled sub-threshold activity.

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