Role of the right inferior parietal cortex in auditory selective attention: An rTMS study

Bareham, Corinne A., Georgieva, Stanimira D., Kamke, Marc R., Lloyd, David, Bekinschtein, Tristan A. and Mattingley, Jason B. (2017) Role of the right inferior parietal cortex in auditory selective attention: An rTMS study. Cortex; A Journal Devoted to the Study of the Nervous System and Behavior, 99 30-38. doi:10.1016/j.cortex.2017.10.003

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Author Bareham, Corinne A.
Georgieva, Stanimira D.
Kamke, Marc R.
Lloyd, David
Bekinschtein, Tristan A.
Mattingley, Jason B.
Title Role of the right inferior parietal cortex in auditory selective attention: An rTMS study
Journal name Cortex; A Journal Devoted to the Study of the Nervous System and Behavior   Check publisher's open access policy
ISSN 1973-8102
Publication date 2017-10-16
Year available 2017
Sub-type Article (original research)
DOI 10.1016/j.cortex.2017.10.003
Open Access Status File (Author Post-print)
Volume 99
Start page 30
End page 38
Total pages 9
Place of publication Amsterdam, NX Netherlands
Publisher Elsevier
Language eng
Subject 3206 Neuropsychology and Physiological Psychology
3205 Experimental and Cognitive Psychology
2805 Cognitive Neuroscience
Abstract Selective attention is the process of directing limited capacity resources to behaviourally relevant stimuli while ignoring competing stimuli that are currently irrelevant. Studies in healthy human participants and in individuals with focal brain lesions have suggested that the right parietal cortex is crucial for resolving competition for attention. Following right-hemisphere damage, for example, patients may have difficulty reporting a brief, left-sided stimulus if it occurs with a competitor on the right, even though the same left stimulus is reported normally when it occurs alone. Such "extinction" of contralesional stimuli has been documented for all the major sense modalities, but it remains unclear whether its occurrence reflects involvement of one or more specific subregions of the temporo-parietal cortex. Here we employed repetitive transcranial magnetic stimulation (rTMS) over the right hemisphere to examine the effect of disruption of two candidate regions - the supramarginal gyrus (SMG) and the superior temporal gyrus (STG) - on auditory selective attention. Eighteen neurologically normal, right-handed participants performed an auditory task, in which they had to detect target digits presented within simultaneous dichotic streams of spoken distractor letters in the left and right channels, both before and after 20 min of 1 Hz rTMS over the SMG, STG or a somatosensory control site (S1). Across blocks, participants were asked to report on auditory streams in the left, right, or both channels, which yielded focused and divided attention conditions. Performance was unchanged for the two focused attention conditions, regardless of stimulation site, but was selectively impaired for contralateral left-sided targets in the divided attention condition following stimulation of the right SMG, but not the STG or S1. Our findings suggest a causal role for the right inferior parietal cortex in auditory selective attention.
Keyword Audition
Brain stimulation
Selective attention
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID APP1034110
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
Queensland Brain Institute Publications
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Created: Wed, 15 Nov 2017, 12:01:10 EST