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Visual-tactile spatial interaction in saccade generation.

Adele Diederich1, Hans Colonius, Daniela Bockhorst

  • 1School of Humanities and Social Sciences, International University Bremen, Bremen, Germany.

Experimental Brain Research
|January 24, 2003
PubMed
Summary
This summary is machine-generated.

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Visual-tactile stimuli speed up saccadic reaction times, especially when close together. This multisensory facilitation is linked to neural interactions in the superior colliculus.

Area of Science:

  • Neuroscience
  • Cognitive Science
  • Sensory Integration

Background:

  • Saccadic reaction times (SRT) are influenced by non-visual stimuli proximity.
  • Multisensory interactions in saccade generation show spatial dependence.

Purpose of the Study:

  • Investigate visual-tactile interaction effects on SRT.
  • Examine effects within a focused attention paradigm.

Main Methods:

  • Presented unimodal visual and bimodal visual-tactile stimuli.
  • Measured saccadic reaction times.
  • Analyzed effects based on stimulus presentation (ipsi- vs. contralateral) and visual target eccentricity.

Main Results:

  • Bimodal stimuli reduced SRT by up to 30 ms compared to unimodal visual targets.

Related Experiment Videos

  • Facilitation was greater for ipsilateral than contralateral presentations.
  • The effect increased with visual target eccentricity.

    • Conclusions:

    • Visual-tactile interaction significantly facilitates saccadic eye movements.
    • Results support the role of superior colliculus bimodal neurons in this multisensory facilitation.