Smelling within a sniff: Human olfactory perception embeds fine temporal resolution
收藏科学数据银行2024-09-25 更新2026-04-23 收录
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资源简介：
A sniff in humans typically lasts 1-3 seconds and is commonly considered to produce a long-exposure shot of the chemical environment that sets the temporal limit of olfactory perception. To break this limit, we devised a sniff-triggered apparatus that controls odorant deliveries within a sniff with a precision of 18 milliseconds (ms). Using this apparatus, we show through rigorous psychophysical testing of 229 participants (649 sessions) that two odorants presented in one order and its reverse become perceptually discriminable when the stimulus onset asynchrony (SOA) is merely 60 ms (120 ms difference). Discrimination performance improves with the length of SOA and is independent of explicit knowledge of the temporal order of odorants or the relative amount of odorant molecules accumulated in a sniff. Our findings demonstrate that human olfactory perception is sensitive to chemical dynamics within a single sniff and provide behavioral evidence for a temporal code of odor identity.
提供机构：
Chinese Institute for Brain Research, Beijing 102206, China.; State Key Laboratory of Brain and Cognitive Science, Institute of Psychology, Chinese Academy of Sciences, Beijing 100101, China.; Department of Psychology, University of Chinese Academy of Sciences, Beijing 100049, China.; Department of Otolaryngology, Ohio State University, Columbus, OH 43212, United States.
创建时间：
2022-12-14
