Dimensions of interoception predict premonitory urges and tic severity in Tourette syndrome

Rae, Charlotte L, Larsson, Dennis E O, Garfinkel, Sarah N and Critchley, Hugo D (2019) Dimensions of interoception predict premonitory urges and tic severity in Tourette syndrome. Psychiatry Research, 271. pp. 469-475. ISSN 0165-1781

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Abstract

Interoceptive processes in Tourette syndrome may foster the premonitory urges that commonly precede tics. Twenty-one adults with TS and 22 controls completed heartbeat tracking and discrimination tasks. Three dimensions of interoception were examined: objective accuracy, metacognitive awareness, and subjective (self-report) sensibility. Trait interoceptive prediction error was calculated as the discrepancy between accuracy and sensibility. Participants with TS had numerically lower interoceptive accuracy on the heartbeat tracking task, and increased self-reported interoceptive sensibility. While these group differences were not significant, the discrepancy between lower interoceptive accuracy and heightened sensibility, i.e. the trait interoceptive prediction error, was significantly greater in TS compared to controls. This suggests a heightened higher-order sensitivity to bodily sensations in TS, relative to a noisier perceptual representation of afferent bodily signals. Moreover, interoceptive sensibility predicted the severity of premonitory sensations and tics. This suggests interventions that work to align dimensions of interoceptive experience in TS hold therapeutic potential.

Item Type: Article
Keywords: body perception; heartbeat; hyperkinetic movement disorder; trait interoceptive prediction error; metacognition
Schools and Departments: Brighton and Sussex Medical School > Brighton and Sussex Medical School
Brighton and Sussex Medical School > Neuroscience
Research Centres and Groups: Sackler Centre for Consciousness Science
Sussex Neuroscience
Depositing User: Alexei Fisk
Date Deposited: 13 Dec 2018 09:40
Last Modified: 02 Jul 2019 13:35
URI: http://sro.sussex.ac.uk/id/eprint/80757

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