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Time Adaptation Shows Duration Selectivity in the Human Parietal Cortex

Hayashi, MJ; Ditye, T; Harada, T; Hashiguchi, M; Sadato, N; Carlson, S; Walsh, V; (2015) Time Adaptation Shows Duration Selectivity in the Human Parietal Cortex. PLoS Biology , 13 (9) , Article e1002262. 10.1371/journal.pbio.1002262. Green open access

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Abstract

Although psychological and computational models of time estimation have postulated the existence of neural representations tuned for specific durations, empirical evidence of this notion has been lacking. Here, using a functional magnetic resonance imaging (fMRI) adaptation paradigm, we show that the inferior parietal lobule (IPL) (corresponding to the supramarginal gyrus) exhibited reduction in neural activity due to adaptation when a visual stimulus of the same duration was repeatedly presented. Adaptation was strongest when stimuli of identical durations were repeated, and it gradually decreased as the difference between the reference and test durations increased. This tuning property generalized across a broad range of durations, indicating the presence of general time-representation mechanisms in the IPL. Furthermore, adaptation was observed irrespective of the subject's attention to time. Repetition of a nontemporal aspect of the stimulus (i.e., shape) did not produce neural adaptation in the IPL. These results provide neural evidence for duration-tuned representations in the human brain.

Type: Article
Title: Time Adaptation Shows Duration Selectivity in the Human Parietal Cortex
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1371/journal.pbio.1002262
Publisher version: http://dx.doi.org/10.1371/journal.pbio.1002262
Language: English
Additional information: © 2015 Hayashi et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences > Institute of Cognitive Neuroscience
URI: https://discovery.ucl.ac.uk/id/eprint/1476517
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