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Related Experiment Videos

Tactile interference in visually guided reach-to-grasp movements.

Ada Kritikos1, Michael Beresford

  • 1School of Behavioural Science, Department of Psychology, University of Melbourne, Victoria 3010, Australia. a.kritikos@psych.unimelb.edu.au

Experimental Brain Research
|April 27, 2002
PubMed
Summary

Unseen touch information can alter how we visually guide our hands to grasp objects. The size of a tactile distractor, even when not relevant, impacts grasp movements.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Motor Control

Background:

  • Cross-modal interactions are crucial for goal-directed actions.
  • Understanding how non-relevant sensory information influences motor control is key.

Purpose of the Study:

  • To investigate the influence of non-relevant tactile stimuli on visually guided reach-to-grasp movements.
  • To examine how tactile distractor size affects kinematic parameters.

Main Methods:

  • Participants performed reach-to-grasp movements towards visual targets.
  • Unseen tactile distractors of varying sizes were presented to the non-reaching hand.
  • Kinematic data of the movements were analyzed.

Main Results:

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  • Kinematic alterations were primarily observed in the grasp component of the movement.
  • The size of the unseen tactile distractor in the non-reaching hand significantly modulated the grasp parameters of the reaching hand.
  • These effects were specific to the reaching right hand.

    • Conclusions:

    • Tactile information, even when irrelevant, influences visually guided grasping.
    • Findings support theories on the integration of sensory information in action control.
    • This highlights complex cross-modal interactions in motor planning and execution.