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Exploring the internal forward model: action-effect prediction and attention in sensorimotor processing.

Anthony W Harrison1, Gethin Hughes2, Gabriella Rudman1

  • 1School of Psychology, UNSW Sydney, Mathews Building, Library Walk, Kensington NSW 2052, Australia.

Cerebral Cortex (New York, N.Y. : 1991)
|June 8, 2023
PubMed
Summary
This summary is machine-generated.

Action-effect predictions influence motor preparation but not sensory attenuation of self-generated sounds. Attentional mechanisms, not action-effect contingency, appear to suppress auditory N1 responses during stimulus-driven movements.

Keywords:
Action-effect contingencyevent-related potentialmotor preparationsensory attenuationvolition

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Motor Control

Background:

  • Action-effect predictions link actions to sensory outcomes, influencing movement and sensory attenuation.
  • Sensory attenuation reduces responses to self-generated stimuli, but its modulation by action-effect prediction is debated.
  • Existing research often focuses on auditory N1, with conflicting results on its sensitivity to action-effect prediction.

Purpose of the Study:

  • Investigate how action-effect contingency affects event-related potentials in visually cued (stimulus-driven) versus uncued (volitional) movements.
  • Clarify the role of action-effect prediction in sensory attenuation, particularly concerning the auditory N1 component.
  • Explore alternative neurophysiological mechanisms, such as attentional suppression, underlying sensory attenuation.

Main Methods:

  • Recorded event-related potentials (ERPs) in 64 participants performing visually cued and uncued movements.
  • Manipulated action-effect contingency to assess its influence on motor preparation and sensory processing.
  • Analyzed N1 amplitude and other electrophysiological markers, including parieto-occipital activity.

Main Results:

  • Replicated findings of reduced N1 amplitude for tones produced by stimulus-driven movements.
  • Action-effect contingency influenced motor preparation but did not significantly affect N1 amplitudes.
  • Identified lateralized parieto-occipital activity correlating with N1 reduction and attentional suppression.

Conclusions:

  • Action-effect contingency does not directly modulate the auditory N1 amplitude during sensory attenuation.
  • Attentional mechanisms, rather than action-effect contingency, may underlie the suppression of neurophysiological responses to self-generated sounds in stimulus-driven actions.
  • Findings offer new insights into sensorimotor coordination and the neurophysiological basis of sensory attenuation.