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Balance perturbation and error processing elicit distinct brain dynamics.

Shayan Jalilpour1, Gernot Müller-Putz1,2

  • 1Institute of Neural Engineering, Graz University of Technology, Graz, Austria.

Journal of Neural Engineering
|March 15, 2023
PubMed
Summary
This summary is machine-generated.

Balance perturbation does not trigger error signals in the brain. Instead, distinct neural markers like error positivity (Pe) and error-related alpha suppression (ERAS) signal conscious error detection during postural instability.

Keywords:
electroencephalographyerror-related potentialperturbation-evoked potentialsource localization

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Area of Science:

  • Neuroscience
  • Human Motor Control
  • Cognitive Science

Background:

  • Maintaining balance involves complex multisensory integration and motor control.
  • Perturbation-evoked potentials (PEPs), particularly the N1 component, are observed in EEG during balance disturbances.
  • The role of error processing in eliciting PEPs, specifically the N1 component, remains debated.

Purpose of the Study:

  • To investigate whether the brain interprets postural instability as a cognitive error.
  • To differentiate neural responses related to balance perturbation from those related to error processing.

Main Methods:

  • Participants experienced both erroneous (unexpected direction) and correct (expected direction) balance perturbations.
  • Electroencephalogram (EEG) data were analyzed in time, time-frequency, and source domains.
  • Identified neural markers associated with error processing, including error positivity (Pe) and error-related alpha suppression (ERAS).

Main Results:

  • Two distinct neural markers, Pe and ERAS, were identified during erroneous perturbations.
  • Early neural correlates of balance perturbation were not associated with neural error processing.
  • Pe and ERAS are linked to the conscious perception of errors.

Conclusions:

  • Early cortical responses to balance perturbations are not indicative of neural error processing.
  • Postural errors elicit unique cortical responses distinct from the N1 potential of PEPs.
  • Conscious error processing during balance tasks involves specific neural signatures like Pe and ERAS.