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Visuomotor Prediction Errors Modulate EEG Activity Over Parietal Cortex.

F-A Savoie1,2, F Thénault3, K Whittingstall1,2

  • 1Département de médecine nucléaire et radiobiologie, Faculté de médecine et des sciences de la santé, Université de Sherbrooke, Sherbrooke, Quebec, Canada.

Scientific Reports
|August 23, 2018
PubMed
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This summary is machine-generated.

This study used electroencephalography to investigate visuomotor prediction errors (PEs) in the parietal cortex. Researchers found distinct theta and alpha/beta oscillations associated with PEs during visuomotor adaptation.

Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Motor Control

Background:

  • The parietal cortex plays a role in visuomotor adaptation.
  • It's unclear if it specifically processes visuomotor prediction errors (PEs).
  • Isolating PEs is challenging due to their association with task errors and movement changes.

Purpose of the Study:

  • To investigate the specific modulation of the parietal cortex by visuomotor prediction errors (PEs).
  • To differentiate the neural correlates of PEs from task errors and motor output changes.

Main Methods:

  • Used electroencephalography (EEG) to record brain activity.
  • Compared a strategy (STR) condition with PEs to a post-adaptation (POST) condition without PEs.
  • Matched conditions for task errors and movement kinematics to isolate PEs.

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Main Results:

  • Observed significant parietal modulations in current source density and theta power (2-4 Hz) after movement onset in the STR condition.
  • Found increased alpha/low beta power (8-18 Hz) during the post-movement period in the STR condition.
  • These modulations were specific to the presence of PEs.

Conclusions:

  • Theta oscillations may reflect the bottom-up processing of prediction errors.
  • Alpha/beta oscillations might indicate top-down revision of predictions.
  • The parietal cortex is specifically modulated by visuomotor prediction errors.