fMRI scanner noise interaction with affective neural processes

Antal, Andrea, Skouras, Stavros, Gray, Marcus, Critchley, Hugo and Koelsch, Stefan (2013) fMRI scanner noise interaction with affective neural processes. PLoS ONE, 8 (11). e80564. ISSN 1932-6203

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Abstract

The purpose of the present study was the investigation of interaction effects between functional MRI scanner noise and affective neural processes. Stimuli comprised of psychoacoustically balanced musical pieces, expressing three different emotions (fear, neutral, joy). Participants (N=34, 19 female) were split into two groups, one subjected to continuous scanning and another subjected to sparse temporal scanning that features decreased scanner noise. Tests for interaction effects between scanning group (sparse/quieter vs continuous/noisier) and emotion (fear, neutral, joy) were performed. Results revealed interactions between the affective expression of stimuli and scanning group localized in bilateral auditory cortex, insula and visual cortex (calcarine sulcus). Post-hoc comparisons revealed that during sparse scanning, but not during continuous scanning, BOLD signals were significantly stronger for joy than for fear, as well as stronger for fear than for neutral in bilateral auditory cortex. During continuous scanning, but not during sparse scanning, BOLD signals were significantly stronger for joy than for neutral in the left auditory cortex and for joy than for fear in the calcarine sulcus. To the authors' knowledge, this is the first study to show a statistical interaction effect between scanner noise and affective processes and extends evidence suggesting scanner noise to be an important factor in functional MRI research that can affect and distort affective brain processes.

Item Type: Article
Schools and Departments: Brighton and Sussex Medical School > Neuroscience
School of Psychology > Psychology
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Depositing User: Catrina Hey
Date Deposited: 11 Sep 2014 10:35
Last Modified: 07 Aug 2017 06:21
URI: http://sro.sussex.ac.uk/id/eprint/49893

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