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Left insular cortex and left SFG underlie prismatic adaptation effects on time perception: Evidence from fMRI

Magnani, B and Frassinetti, F and Ditye, T and Oliveri, M and Costantini, M and Walsh, V (2014) 'Left insular cortex and left SFG underlie prismatic adaptation effects on time perception: Evidence from fMRI.' NeuroImage, 92. 340 - 348. ISSN 1053-8119

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Abstract

Prismatic adaptation (PA) has been shown to affect left-to-right spatial representations of temporal durations. A leftward aftereffect usually distorts time representation toward an underestimation, while rightward aftereffect usually results in an overestimation of temporal durations. Here, we used functional magnetic resonance imaging (fMRI) to study the neural mechanisms that underlie PA effects on time perception. Additionally, we investigated whether the effect of PA on time is transient or stable and, in the case of stability, which cortical areas are responsible of its maintenance.Functional brain images were acquired while participants (n. = 17) performed a time reproduction task and a control-task before, immediately after and 30. min after PA inducing a leftward aftereffect, administered outside the scanner.The leftward aftereffect induced an underestimation of time intervals that lasted for at least 30. min. The left anterior insula and the left superior frontal gyrus showed increased functional activation immediately after versus before PA in the time versus the control-task, suggesting these brain areas to be involved in the executive spatial manipulation of the representation of time. The left middle frontal gyrus showed an increase of activation after 30. min with respect to before PA. This suggests that this brain region may play a key role in the maintenance of the PA effect over time. © 2014 .

Item Type: Article
Subjects: B Philosophy. Psychology. Religion > BF Psychology
R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry
Divisions: Faculty of Science and Health > Psychology, Department of
Depositing User: Jim Jamieson
Date Deposited: 21 Sep 2015 10:59
Last Modified: 17 Aug 2017 17:32
URI: http://repository.essex.ac.uk/id/eprint/14962

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