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Indistinguishable odour enantiomers: Differences between peripheral and central-nervous electrophysiological responses
Stockholm University, Faculty of Social Sciences, Department of Psychology, Perception and psychophysics. Technische Universität Dresden, Germany.
Stockholm University, Faculty of Social Sciences, Department of Psychology, Perception and psychophysics.
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Number of Authors: 52017 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 7, article id 8978Article in journal (Refereed) Published
Abstract [en]

The ability of humans to discriminate enantiomeric odour pairs is substance-specific. Current literature suggests that psychophysical discrimination of odour enantiomers mainly depends on the peripheral processing at the level of the olfactory sensory neurons (OSN). To study the influence of central processing in discrimination, we investigated differences in the electrophysiological responses to psychophysically indistinguishable (+)- and (-)- rose oxide enantiomers at peripheral and central-nervous levels in humans. We recorded the electro-olfactogram (EOG) from the olfactory epithelium and the EEG-derived olfactory event-related potentials (OERP). Results from a psychophysical three alternative forced choice test indicated indistinguishability of the two odour enantiomers. In a total of 19 young participants EOG could be recorded in 74 and OERP in 95% of subjects. Significantly different EOG amplitudes and latencies were recorded in response to the 2 stimuli. However, no such differences in amplitude or latency emerged for the OERP. In conclusion, although the pair of enantiomer could be discriminated at a peripheral level this did not lead to a central-nervous/cognitive differentiation of the two stimuli.

Place, publisher, year, edition, pages
2017. Vol. 7, article id 8978
Keywords [en]
electroencephalography – EEG, olfactory receptors
National Category
Neurosciences Psychology
Research subject
Psychology
Identifiers
URN: urn:nbn:se:su:diva-147068DOI: 10.1038/s41598-017-09594-3ISI: 000408107000112PubMedID: 28827647OAI: oai:DiVA.org:su-147068DiVA, id: diva2:1142516
Available from: 2017-09-19 Created: 2017-09-19 Last updated: 2018-01-15Bibliographically approved

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