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Effects of scanner acoustic noise on intrinsic brain activity during auditory stimulation

  • Functional Neuroradiology
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Abstract

Introduction

Although the effects of scanner background noise (SBN) during functional magnetic resonance imaging (fMRI) have been extensively investigated for the brain regions involved in auditory processing, its impact on other types of intrinsic brain activity has largely been neglected. The present study evaluated the influence of SBN on a number of intrinsic connectivity networks (ICNs) during auditory stimulation by comparing the results obtained using sparse temporal acquisition (STA) with those using continuous acquisition (CA).

Methods

Fourteen healthy subjects were presented with classical music pieces in a block paradigm during two sessions of STA and CA. A volume-matched CA dataset (CAm) was generated by subsampling the CA dataset to temporally match it with the STA data. Independent component analysis was performed on the concatenated STA–CAm datasets, and voxel data, time courses, power spectra, and functional connectivity were compared.

Results

The ICA revealed 19 ICNs; the auditory, default mode, salience, and frontoparietal networks showed greater activity in the STA. The spectral peaks in 17 networks corresponded to the stimulation cycles in the STA, while only five networks displayed this correspondence in the CA. The dorsal default mode and salience networks exhibited stronger correlations with the stimulus waveform in the STA.

Conclusions

SBN appeared to influence not only the areas of auditory response but also the majority of other ICNs, including attention and sensory networks. Therefore, SBN should be regarded as a serious nuisance factor during fMRI studies investigating intrinsic brain activity under external stimulation or task loads.

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Acknowledgments

This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Education (2014R1A1A4A01003909).

Ethical standards and patient consent

We declare that all human and animal studies have been approved by the Kangwon National University Hospital Institutional Review Board and have therefore been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. We declare that all patients gave informed consent prior to inclusion in this study.

Conflict of interest

We declare that we have no conflict of interest.

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Authors and Affiliations

  1. Institute of Medical Science, School of Medicine, Kangwon National University, Chuncheon, Republic of Korea

    Natalia Yakunina

  2. Neuroscience Research Institute, Kangwon National University Hospital, Chuncheon, Republic of Korea

    Natalia Yakunina, Sam Soo Kim & Eui-Cheol Nam

  3. Department of Rehabilitation Medicine, Kangwon National University Hospital, Chuncheon, Republic of Korea

    Eun Kyoung Kang

  4. Department of Otolaryngology, Kangwon National University Hospital, Chuncheon, Republic of Korea

    Tae Su Kim

  5. Department of Biopsychology, Cognition, and Neuroscience, University of Michigan, Ann Arbor, MI, USA

    Ji-Hoon Min

  6. Department of Radiology, Kangwon National University, School of Medicine, Chuncheon, Republic of Korea

    Sam Soo Kim

  7. Department of Otolaryngology, Kangwon National University, School of Medicine, Kangwondaehak-gil 1, Chuncheon, 200-701, Republic of Korea

    Tae Su Kim & Eui-Cheol Nam

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  1. Natalia Yakunina
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Correspondence to Eui-Cheol Nam.

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Yakunina, N., Kang, E.K., Kim, T.S. et al. Effects of scanner acoustic noise on intrinsic brain activity during auditory stimulation. Neuroradiology 57, 1063–1073 (2015). https://doi.org/10.1007/s00234-015-1561-1

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