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Enhancing duration processing with parietal brain stimulation

Dormal, Valérie, Javadi, Amir-Homayoun, Pesenti, Mauro, Walsh, Vincent, Cappelletti, Marinella (2016) Enhancing duration processing with parietal brain stimulation. Neuropsychologia, 85 . pp. 272-277. ISSN 0028-3932. (doi:10.1016/j.neuropsychologia.2016.03.033) (KAR id:54791)

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Numerosity and duration are thought to share common magnitude-based mechanisms in brain regions including the right parietal and frontal cortices like the supplementary motor area, SMA. Numerosity and duration are, however, also different in several intrinsic features. For instance, in a quantification context, numerosity is known for being more automatically accessed than temporal events, and durations are by definition sequential whereas numerosity can be both sequential and simultaneous. Moreover, numerosity and duration processing diverge in terms of their neuronal correlates. Whether these observed neuronal specificities can be accounted for by differences in automaticity or presentation-mode is however not clear. To address this issue, we used brain stimulation (transcranial random noise stimulation, tRNS) to the right parietal cortex or the SMA combined with experimental stimuli differing in their level of automaticity (numerosity and duration) and presentation mode (sequential or simultaneous). Compared to a non-stimulation group, performance changed in duration but not in numerosity categorisation following right parietal but not SMA stimulation. These results indicate that the right parietal cortex is critical for duration processing, and suggest that tRNS has a stronger effect on less automatic processes such as duration.

Item Type: Article
DOI/Identification number: 10.1016/j.neuropsychologia.2016.03.033
Uncontrolled keywords: Duration; Numerosity; transcranial Random Noise Stimulation (tRNS); Parietal cortex; Supplemental Motor Area (SMA); Automaticity; Presentation mode
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Divisions: Divisions > Division of Human and Social Sciences > School of Psychology
Depositing User: Amir-Homayoun Javadi
Date Deposited: 05 Apr 2016 12:18 UTC
Last Modified: 04 Jul 2023 14:00 UTC
Resource URI: (The current URI for this page, for reference purposes)

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Javadi, Amir-Homayoun.

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