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Motor-induced visual motion: hand movements driving visual motion perception.

Mirjam Keetels1, Jeroen J Stekelenburg

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Self-generated finger movements can alter visual motion perception. Directional hand movements create illusory visual motion, while stationary movements reduce perceived motion.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Sensory Integration

Background:

  • Visual perception is influenced by multisensory input.
  • The relationship between motor activity and visual perception is complex.
  • Self-generated movements may modulate visual processing.

Purpose of the Study:

  • To investigate how self-generated finger movements affect visual motion perception.
  • To determine if directional hand movements induce illusory visual motion.
  • To examine the effect of stationary motor movements on visual motion perception.

Main Methods:

  • Participants performed self-generated key presses (horizontal or vertical).
  • Visual motion perception of a blinking bar was assessed.
  • Experiments controlled for response bias using a two-alternative forced-choice task.

Main Results:

  • Directional finger movements induced illusory visual motion (motor-induced visual motion).
  • Stationary finger movements reduced perceived visual motion.
  • The directional component of motor activity is critical for inducing visual motion illusions.

Conclusions:

  • Self-generated directional movements create illusory visual motion.
  • Stationary movements diminish visual motion perception.
  • Motor commands significantly influence visual motion processing.