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Context-dependent changes in tactile perception during movement execution.

Georgiana Juravle1, Francis McGlone2, Charles Spence3

  • 1Crossmodal Research Laboratory, Department of Experimental Psychology, Oxford University Oxford, UK ; Department of Systems Neuroscience, Center for Experimental Medicine, University Medical Center Hamburg-Eppendorf Hamburg, Germany.

Frontiers in Psychology
|December 25, 2013
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Summary
This summary is machine-generated.

Tactile suppression, the inhibition of touch during movement, depends on movement type. Exploratory movements enhance tactile perception of surfaces, unlike reaching movements, showing context-dependent sensory modulation.

Keywords:
active/passive movementdual-taskingexplorationreachingtactile perception

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Area of Science:

  • Neuroscience
  • Sensory Perception
  • Motor Control

Background:

  • Tactile perception is known to be inhibited during movement execution, a phenomenon termed tactile suppression.
  • Previous research has established that sensory processing can be modulated by motor activity.

Purpose of the Study:

  • To investigate whether the type of movement influences the occurrence and extent of tactile suppression.
  • To determine if active, exploratory movements enhance tactile perception compared to reaching movements.

Main Methods:

  • Participants performed reaching or exploratory movements while undergoing tactile discrimination tasks (TD) and surface discrimination tasks (SD).
  • Tactile thresholds for vibratory stimuli and surface material discrimination were measured during active movement, passive touch, and rest conditions.

Main Results:

  • Tactile thresholds were higher during active movement and passive touch compared to rest, confirming tactile suppression.
  • Surface discrimination performance was significantly better during single-tasking, active, and exploratory movements compared to dual-tasking, passive, and reaching movements.

Conclusions:

  • Tactile suppression is context-dependent, occurring for irrelevant tactile features during both reaching and exploratory movements.
  • Active hand movements aimed at exploring surfaces enhance tactile perceptual performance, suggesting a modulation of sensory processing based on task relevance.