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Electro-olfactogram Responses Before and After Aversive Olfactory Conditioning in Humans
Stockholm University, Faculty of Social Sciences, Department of Psychology. TU Dresden, Germany.ORCID iD: 0000-0003-2947-5424
Stockholm University, Faculty of Social Sciences, Department of Psychology.
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Number of Authors: 52018 (English)In: Neuroscience, ISSN 0306-4522, E-ISSN 1873-7544, Vol. 373, p. 199-206Article in journal (Refereed) Published
Abstract [en]

The aim of the present study was to investigate whether repetitive aversive odor conditioning induced changes at the level of the peripheral olfactory system in humans. A total of 51 volunteers participated. A pair of indistinguishable odor enantiomers [(+)-rose oxide and (-)-rose oxide] were used as stimuli. During the pre-conditioning, participants' ability to discriminate between the two odors was assessed using a three-alternative, forced-choice discrimination test. In addition, electro-olfactograms ( EOG) from the olfactory epithelium were recorded. Participants underwent three conditioning sessions on consecutive days. The experimental group received an electrical stimulus to the forearm only following (+)-rose oxide presentation, whereas its enantiomer sibling was never paired with the aversive stimulus; the control group did not receive any electrical stimulation. During the post-conditioning session, their ability to discriminate the two enantiomers was assessed again using the discrimination test and EOG recordings were obtained similarly to the pre-conditioning session. Results showed significant differences in the peripheral electrophysiological responses between the conditioned and the unconditioned stimulus, demonstrating contextually induced changes at the level of the first neuron in the olfactory system.

Place, publisher, year, edition, pages
2018. Vol. 373, p. 199-206
Keywords [en]
aversive conditioning, olfactory conditioning, electro-olfactogram, olfactory epithelium
National Category
Physiology
Identifiers
URN: urn:nbn:se:su:diva-154830DOI: 10.1016/j.neuroscience.2018.01.025ISI: 000425926600018PubMedID: 29360513OAI: oai:DiVA.org:su-154830DiVA, id: diva2:1196643
Available from: 2018-04-10 Created: 2018-04-10 Last updated: 2018-04-10Bibliographically approved

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