• Alexander Wieck Fjaeldstad, Hans Jacob Nørgaard, and Henrique Miguel Fernandes.
• Flavour Institute, Aarhus University, Noerrebrogade 44, 10G, 8000 Aarhus, Denmark; Flavour Clinic, ENT Department, Holstebro Regional Hospital, Laegaardsvej 12, 7500, Holstebro, Denmark; Department of Psychiatry, Warneford Hospital, University of Oxford, OX3 7JX Oxford, United Kingdom. Electronic address: Alefja@rm.dk.
• Neuroscience. 2019 May 15; 406: 262-267.

AbstractSensory perception is neither static nor simple. The senses influence each other during multisensory stimulation and can be both suppressive and super-additive. As most knowledge of human olfactory perception is derived from functional neuroimaging studies, in particular fMRI, our current understanding of olfactory perception has systematically been investigated in an environment with concurrent loud sounds. To date, the confounding effects of acoustic fMRI-noise during scanning on olfactory perception have not yet been investigated. In this study we investigate how acoustic noise derived from the rapid switching of MR gradient coils, affects olfactory perception. For this, 50 subjects were tested in both a silent setting and an fMRI-noise setting, in a randomised order. We found that fMRI-related acoustic noise had a significant negative effect on the olfactory detection threshold score. No significant effects were identified on olfactory discrimination, identification, identification certainty, hedonic rating, or intensity rating.Copyright © 2019 IBRO. All rights reserved.

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