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Visuo-proprioceptive recalibration and the sensorimotor map.

Hannah J Block1,2, Yang Liu1,2

  • 1Department of Kinesiology, School of Public Health, Indiana University Bloomington, Bloomington, Indiana, United States.

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Perceptual recalibration of hand position alters sensorimotor maps for reaching. While initial reaches were shorter after recalibration, performance quickly returned to baseline, suggesting a short-lived interaction.

Keywords:
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Area of Science:

  • Neuroscience
  • Motor Control
  • Perception

Background:

  • Accurate hand movement relies on spatial perception.
  • It is debated whether perception and action share a common sensorimotor map or use separate representations.
  • Previous research suggests separate body representations for perception and action.

Purpose of the Study:

  • To investigate if perceptual recalibration of hand position influences the sensorimotor map used for reach planning.
  • To determine if changes in perceived hand position affect motor control.

Main Methods:

  • Participants performed a target-directed reaching task using a robotic manipulandum.
  • A Mismatch group experienced visual-proprioceptive cue conflict, inducing recalibration of perceived hand position.
  • A Veridical group experienced aligned cues; their reaching was assessed before and after perceptual calibration tasks.

Main Results:

  • The Mismatch group exhibited significantly shorter reaches post-recalibration, aligning with altered hand perception.
  • Reaching performance in the Mismatch group returned to baseline within approximately 10 reaches.
  • The Veridical group showed no significant changes in reach distance.

Conclusions:

  • Perceptual recalibration appears to influence the sensorimotor map used for planning reaches.
  • The effect of perceptual recalibration on reach planning may be transient.
  • This suggests a dynamic interaction between perception and action planning.