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Multi-digit tactile perception I: motion integration benefits for tactile trajectories presented bimanually

Arslanova, Irena; Takamuku, Shinya; Gomi, Hiroaki; Haggard, Patrick; (2022) Multi-digit tactile perception I: motion integration benefits for tactile trajectories presented bimanually. Journal of Neurophysiology , 128 pp. 418-433. 10.1152/jn.00022.2022. Green open access

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Abstract

Interactions with objects involve simultaneous contact with multiple, not necessarily adjacent, skin regions. While advances have been made in understanding the capacity to selectively attend to a single tactile element among distracting stimulations, here, we examine how multiple stimulus elements are explicitly integrated into an overall tactile percept. Across four experiments, participants averaged the direction of two simultaneous tactile motion trajectories of varying discrepancy delivered to different fingerpads. Averaging performance differed between within- and between-hands conditions in terms of sensitivity and precision but was unaffected by somatotopic proximity between stimulated fingers. First, precision was greater in between-hand compared to within-hand conditions, demonstrating a bimanual perceptual advantage in multi-touch integration. Second, sensitivity to the average direction was influenced by the discrepancy between individual motion signals, but only for within-hand conditions. Overall, our experiments identify key factors that influence perception of simultaneous tactile events. In particular, we show that multi-touch integration is constrained by hand-specific rather than digit-specific mechanisms.

Type: Article
Title: Multi-digit tactile perception I: motion integration benefits for tactile trajectories presented bimanually
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1152/jn.00022.2022
Publisher version: https://doi.org/10.1152/jn.00022.2022
Language: English
Additional information: © 2022 The Authors. Licensed under Creative Commons Attribution CC-BY 4.0.
Keywords: Multi-digit, sensory integration, somatosensory, tactile perception, touch perception
UCL classification: 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 > Institute of Cognitive Neuroscience
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences
URI: https://discovery-pp.ucl.ac.uk/id/eprint/10153571
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