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Related Experiment Video

Updated: Jun 13, 2026

Frame-by-Frame Video Analysis of Idiosyncratic Reach-to-Grasp Movements in Humans
10:51

Frame-by-Frame Video Analysis of Idiosyncratic Reach-to-Grasp Movements in Humans

Published on: January 15, 2018

Touch used to guide action is partially coded in a visual reference frame.

Vanessa Harrar1, Laurence R Harris

  • 1Centre for Vision Research, York University, Toronto, ON, M3J 1P3, Canada.

Experimental Brain Research
|April 30, 2010
PubMed
Summary
This summary is machine-generated.

Touch location is coded in a visual reference frame, even when guiding actions. Eye position influences perceived touch, indicating a shared visual-tactile coding system for both perception and action.

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Area of Science:

  • Neuroscience
  • Somatosensation
  • Human Perception

Background:

  • Perceived touch location is influenced by eye position, suggesting visual reference frame coding.
  • Previous research established visual coding for tactile perception.

Purpose of the Study:

  • To investigate if tactile location is coded differently when guiding an action.
  • To determine if visual reference frames influence tactile coding for action.

Main Methods:

  • Participants experienced touches on their arm while adopting eccentric eye fixations.
  • A touch-sensitive screen recorded perceived touch locations.
  • Subjects used their other arm to point to the perceived touch location.

Main Results:

  • Perceived touch location shifted with eye position (0.016 cm/deg).
  • The effect of eye position on perceived touch was consistent with visual reference frame coding.

Conclusions:

  • Tactile coding for action, like perception, is at least partially processed within a visual reference frame.
  • This suggests a unified visual-tactile system for both sensory perception and motor control.