About the Authors

Kristina Laaksonen

laaks@neuro.hut.fi

Affiliations Brain Research Unit, O.V. Lounasmaa Laboratory and MEG Core, Aalto Neuroimaging, Aalto University, Aalto, Espoo, Finland, Department of Neurological Sciences, University of Helsinki, HY, Helsinki, Finland, Department of Neurology, Helsinki University Central Hospital, HUS, Helsinki, Finland

Liisa Helle

Affiliation Elekta Oy, Helsinki, Finland

Lauri Parkkonen

Affiliations Brain Research Unit, O.V. Lounasmaa Laboratory and MEG Core, Aalto Neuroimaging, Aalto University, Aalto, Espoo, Finland, Elekta Oy, Helsinki, Finland, Department of Biomedical Engineering and Computational Science, Aalto University School of Science, Aalto, Espoo, Finland

Erika Kirveskari

Affiliations Brain Research Unit, O.V. Lounasmaa Laboratory and MEG Core, Aalto Neuroimaging, Aalto University, Aalto, Espoo, Finland, Department of Neurological Sciences, University of Helsinki, HY, Helsinki, Finland, Department of Clinical Neurophysiology, HUS Medical Imaging Center, Helsinki University Central Hospital, HUS, Helsinki, Finland

Jyrki P. Mäkelä

Affiliation BioMag Laboratory, HUS Medical Imaging Center, Helsinki University Central Hospital, Helsinki, Finland

Satu Mustanoja

Affiliations Department of Neurological Sciences, University of Helsinki, HY, Helsinki, Finland, Department of Neurology, Helsinki University Central Hospital, HUS, Helsinki, Finland

Turgut Tatlisumak

Affiliations Department of Neurological Sciences, University of Helsinki, HY, Helsinki, Finland, Department of Neurology, Helsinki University Central Hospital, HUS, Helsinki, Finland

Markku Kaste

Affiliations Department of Neurological Sciences, University of Helsinki, HY, Helsinki, Finland, Department of Neurology, Helsinki University Central Hospital, HUS, Helsinki, Finland

Nina Forss

Affiliations Brain Research Unit, O.V. Lounasmaa Laboratory and MEG Core, Aalto Neuroimaging, Aalto University, Aalto, Espoo, Finland, Department of Neurological Sciences, University of Helsinki, HY, Helsinki, Finland, Department of Neurology, Helsinki University Central Hospital, HUS, Helsinki, Finland

Competing Interests

Authors Lauri Parkkonen and Liisa Helle are fully or partially employed by a commercial company Elekta Oy, which designs, manufactures and markets MEG devices. This dependency does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: KL JM NF EK TT MK. Performed the experiments: JM KL SM. Analyzed the data: KL LH LP. Contributed reagents/materials/analysis tools: KL LH LP. Wrote the paper: KL LH LP SM EK TT JM MK NF.