I Croy1, W Maboshe, T Hummel. 1. Department of Occupational and Environmental Medicine, Goteborg University, Medicinaregatan 16, Box 414, 405 30 Göteborg, Sweden. Ilona.croy@amm.gu.se
Abstract
OBJECTIVE: The hedonic value of odors is reflected in chemosensory evoked potentials with more salient unpleasant odors being processed differently from pleasant odors. However, it is not known if this effect is stable over time. It was examined if chemosensory evoked potentials towards pleasant and unpleasant odors change with repeated presentation. METHODS: 42 participants received two pleasant (Peach and PEA) and one unpleasant (H2S) intensity matched odors in a block design. Intensity and pleasantness were rated after each presentation. Subjective ratings, as well as N1 and P2 of the first stimulus of each block were compared with the two following stimuli of each block. RESULTS: Early and late components of the chemosensory evoked potentials had shorter latencies in response to the unpleasant H2S compared to PEA and Peach. Pleasantness ratings for H2S increased with repeated presentation but were far below neutral even for the third stimulus in a row. In line with this, for H2S only, the P2 amplitude diminished with repeated presentation. CONCLUSION: We assume that unpleasant stimuli catch more attention first hand. However, repeated presentation leads to reduced emotional salience of unpleasant stimuli only, which is mirrored in a decrease of neuronal activation.
OBJECTIVE: The hedonic value of odors is reflected in chemosensory evoked potentials with more salient unpleasant odors being processed differently from pleasant odors. However, it is not known if this effect is stable over time. It was examined if chemosensory evoked potentials towards pleasant and unpleasant odors change with repeated presentation. METHODS: 42 participants received two pleasant (Peach and PEA) and one unpleasant (H2S) intensity matched odors in a block design. Intensity and pleasantness were rated after each presentation. Subjective ratings, as well as N1 and P2 of the first stimulus of each block were compared with the two following stimuli of each block. RESULTS: Early and late components of the chemosensory evoked potentials had shorter latencies in response to the unpleasant H2S compared to PEA and Peach. Pleasantness ratings for H2S increased with repeated presentation but were far below neutral even for the third stimulus in a row. In line with this, for H2S only, the P2 amplitude diminished with repeated presentation. CONCLUSION: We assume that unpleasant stimuli catch more attention first hand. However, repeated presentation leads to reduced emotional salience of unpleasant stimuli only, which is mirrored in a decrease of neuronal activation.
Authors: Charlotte Sinding; François Valadier; Viviana Al-Hassani; Gilles Feron; Anne Tromelin; Ioannis Kontaris; Thomas Hummel Journal: Sci Rep Date: 2017-01-25 Impact factor: 4.379
Authors: Anna Blomkvist; Giulia Izzo; Antonio Aversa; Marco Tullio Liuzza; Maria Grazia Vaccaro; Sandro La Vignera; Antonio Brunetti Journal: Arch Sex Behav Date: 2021-11-17
Authors: Yingxuan Liu; Alexander Toet; Tanja Krone; Robin van Stokkum; Sophia Eijsman; Jan B F van Erp Journal: PLoS One Date: 2020-07-30 Impact factor: 3.240