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A double-blind HD-tDCS/EEG study examining right temporoparietal junction involvement in facial emotion processing

journal contribution
posted on 01.01.2019, 00:00 authored by Peter DonaldsonPeter Donaldson, Melissa KirkovskiMelissa Kirkovski, Nicole Rinehart, Peter EnticottPeter Enticott
Prior studies have demonstrated that aspects of social cognition can be modulated via temporoparietal junction (TPJ) transcranial direct current stimulation (tDCS). However, this technique lacks focality and electrophysiological effects or correlates are rarely examined. The present study investigated whether anodal and/or cathodal high-definition tDCS (HD-tDCS) would influence facial emotion processing performance relative to sham stimulation, and whether task performance changes were related to neurophysiological changes. Participants completed a facial emotion attribution tasks before and after rTPJ HD-tDCS, with event-related potentials (ERP) recorded during task performance. Anodal rTPJ HD-tDCS improved facial emotion processing performance for static depictions of fear (but not surprise). Stimulation condition influenced P300 latency, and also influenced the relationship between behavioural and electrophysiological (ERP) outcomes in several circumstances, findings which both support and challenge anodal-excitation/cathodal-inhibition accounts of tDCS effects. Results suggest that rTPJ anodal HD-tDCS can influence facial emotion recognition (i.e., affective mentalizing), and elucidate the nature and distribution of underlying neurophysiological processes. Stimulation effects, however, might depend on the intensity and salience/valence (negativity/threat) of the emotion, and these behavioural effects may not relate directly or simply to the ERPs assessed here.

History

Journal

Social neuroscience

Volume

14

Issue

6

Pagination

681 - 696

Publisher

Taylor & Francis

Location

Abingdon, Eng.

eISSN

1747-0927

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2019, Informa UK Limited, trading as Taylor & Francis Group