Low frequency repetitive transcranial magnetic stimulation to right parietal cortex disrupts perception of briefly presented stimuli

Howard, C.J. ORCID: 0000-0002-8755-1109, Boulton, H. ORCID: 0000-0003-1919-9243, Bedwell, S.A. ORCID: 0000-0003-3283-7748, Boatman, C.A., Roberts, K.L. ORCID: 0000-0002-8735-2249 and Mitra, S. ORCID: 0000-0001-7620-4809, 2019. Low frequency repetitive transcranial magnetic stimulation to right parietal cortex disrupts perception of briefly presented stimuli. Perception. ISSN 0301-0066

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Abstract

Right parietal cortex has recently been linked to the temporal resolution of attention. We therefore sought to investigate whether disruption to right parietal cortex would affect attention to visual stimuli presented for brief durations. Participants performed a visual discrimination task before and after 10 minutes rTMS (1Hz) to right or central parietal cortex as well as 20 minutes after the second block of trials. Participants reported the spatial frequency of a masked Gabor patch presented for a brief duration of 60, 120 or 240ms. We calculated error magnitudes by comparing accuracy to a guessing model. We then compared error magnitudes to blocks with no stimulation, producing a measure of baselined performance. Baselined performance was poorer at longer stimulus durations after right parietal than central parietal stimulation, suggesting that right parietal cortex is involved in attention to briefly presented stimuli, particularly in situations where rapid accumulation of visual evidence is needed.

Item Type: Journal article
Publication Title: Perception
Creators: Howard, C.J., Boulton, H., Bedwell, S.A., Boatman, C.A., Roberts, K.L. and Mitra, S.
Publisher: Sage
Date: 4 March 2019
ISSN: 0301-0066
Identifiers:
NumberType
10.1177/0301006619834251DOI
Divisions: Schools > School of Social Sciences
Depositing User: Jonathan Gallacher
Date Added: 21 Feb 2019 16:30
Last Modified: 03 Apr 2019 12:53
URI: http://irep.ntu.ac.uk/id/eprint/35786

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