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Vision-Driven Kinesthetic Illusion in Mirror Visual Feedback.

Yuki Ishihara1, Kenri Kodaka1

  • 1Nagoya City University, Nagoya, Aichi, Japan.

I-Perception
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PubMed
Summary

Visual feedback from a mirrored hand strongly influences the sense of motion for the hidden hand, creating a kinesthetic illusion. Anatomical congruency also impacts this illusion when the mirror moves toward the visible hand.

Keywords:
body perceptionmirror visual feedbackmultisensory/cross-modal processingproprioception

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Area of Science:

  • Neuroscience
  • Perception
  • Motor Control

Background:

  • The sense of motion for a hidden limb is influenced by visual input.
  • The specific mechanisms by which visual feedback, particularly mirror visual feedback, affects kinesthetic perception remain incompletely understood.

Purpose of the Study:

  • To investigate how visual images of a mirrored hand directly impact the sense of motion of the hidden hand.
  • To explore the influence of visual feedback on kinesthetic illusion.

Main Methods:

  • Developed an original mirror visual feedback setup with independent horizontal motion control for the mirror and hidden hand.
  • Participants reported the perceived direction of the hidden hand's displacement after movements with quasi-randomized velocities.

Main Results:

  • Subjective perception of the hidden hand's motion was significantly biased towards the direction of the mirror's movement.
  • Anatomical congruency between the visible and mirrored hand influenced the kinesthetic illusion, particularly when the mirror approached the visible hand.

Conclusions:

  • Visual feedback from a mirrored hand plays a crucial role in shaping the kinesthetic illusion of the hidden hand's motion.
  • The direction of visual motion and anatomical congruency are key factors modulating this illusion.