Segregated audio-tactile events destabilize the bimanual coordination of distinct rhythms.

Experimental Brain Research
J LagardeDenis Mottet

Abstract

We examined to what extent the CNS can efficiently bind together the perception of non-coincident multimodal events with coordinated movements. To do so, we selected a bimanual coordination with left-right asymmetry, which was, achieving 3:2 polyrhythmic movements. We asked participants to synchronize left and right fingers' movements to events presented, respectively, to the left and to the right side. In two segregated conditions, sound was presented on one side at one frequency while touch was presented on the other side at the other frequency; thus, the left and right rhythms were paced via a distinct sensory modality. In the three control conditions, the stimuli on both sides were presented via the same sensory modality: sound, touch, or coincident sound and touch. Our aim was to contrast two opposing hypotheses: Sensory segregated pacing (1) stabilizes polyrhythmic coordination because it favors the distinction between the fast and the slow rhythm versus (2) destabilizes polyrhythmic coordination because it introduces a very strong asymmetry. We performed a parametric study in which the ability to maintain the polyrhythmic coordination was explored over a broad range of pacing rates. We found that switches from the polyrh...Continue Reading

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Citations

Nov 4, 2015·Experimental Brain Research·Gregory ZelicJulien Lagarde
Mar 5, 2017·Brain and Cognition·Charlotte RoySimone Dalla Bella
Dec 4, 2019·Psychological Research·Charlotte RoyJulien Lagarde

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