title: Rhythmic TMS over parietal cortex links distinct brain frequencies to global versus local visual processing.
abstract: Neural networks underlying visual perception exhibit oscillations at different frequencies (e.g.,). But how these map onto distinct aspects of visual perception remains elusive. Recent electroencephalography data indicate that theta or beta frequencies at parietal sensors increase in amplitude when conscious perception is dominated by global or local features, respectively, of a reversible visual stimulus. But this provides only correlative, noninterventional evidence. Here we show via transcranial magnetic stimulation (TMS) interventions that short rhythmic bursts of right-parietal TMS at theta or beta frequency can causally benefit processing of global or local levels, respectively, for hierarchical visual stimuli, especially in the context of salient incongruent distractors. This double dissociation between theta and beta TMS reveals distinct causal roles for particular frequencies in processing global versus local visual features.
authors.affiliation: Centre for Cognitive Neuroimaging, Institute of Neuroscience and Psychology, University of Glasgow, Glasgow G12 8QB, UK. v.romei@fil.ion.ucl.ac.uk
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Romei
authors.forename: Jon
authors.initials: J
authors.lastname: Driver
authors.forename: Philippe G
authors.initials: PG
authors.lastname: Schyns
authors.forename: Gregor
authors.initials: G
authors.lastname: Thut
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D009415:Nerve Net / Q000502:physiology; D010296:Parietal Lobe / Q000502:physiology*; D050781:Transcranial Magnetic Stimulation / Q000379:methods*; D014795:Visual Pathways / Q000502:physiology*; D055815:Young Adult