Enhancing duration processing with parietal brain stimulation

Dormal, Valerie; Javadi, Amir-Homayoun; Pesenti, Mauro; Walsh, Vincent and Cappelletti, Marinella. 2016. Enhancing duration processing with parietal brain stimulation. Neuropsychologia, 85, pp. 272-277. ISSN 0028-3932 [Article]

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Abstract or Description

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.

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Duration, Numerosity, transcranial Random Noise Stimulation (tRNS), Parietal cortex, Supplemental Motor Area (SMA), Automaticity, Presentation mode

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28 March 2016Accepted
29 March 2016Published Online
1 May 2016Published

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Date Deposited:

30 Jul 2018 12:36

Last Modified:

29 Apr 2020 16:48



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