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Early visual ERPs show stable body-sensitive patterns over a 4-week test period.

Katie Groves1, Steffan Kennett1, Helge Gillmeister1

  • 1Department of Psychology, University of Essex, Colchester, United Kingdom.

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Early visual event-related potentials (ERPs) and body-sensitive effects show stability over four weeks. These robust neural responses are eligible as electrophysiological biomarkers for body representation.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Electrophysiology

Background:

  • Event-related potential (ERP) studies are highly cited in body representation research.
  • Recent work suggests ERPs could serve as neuropsychiatric biomarkers.
  • The long-term reliability of early visual ERPs and body-sensitive effects remains under-investigated.

Purpose of the Study:

  • To assess the temporal stability of early visual ERP components (P1, N1, VPP).
  • To evaluate the reliability of body-sensitive effects over a four-week period.
  • To identify potential electrophysiological biomarkers for body representation.

Main Methods:

  • Participants completed EEG sessions weekly for four consecutive weeks.
  • Stimuli included images of own bodies, other bodies, and houses.
  • Analysis focused on amplitude and latency of visual P1, N1, and VPP components and body-sensitive effects.

Main Results:

  • Amplitude and latency of early visual components and body-sensitive effects remained stable across the four weeks.
  • VPP component amplitude demonstrated higher reliability than VPP latency.
  • Certain electrode sites showed more robust body-sensitive cortical activity.

Conclusions:

  • Early visual P1, N1, and VPP responses, including body-sensitive effects, are reliable indicators of neuronal activity.
  • These components are suitable for consideration as electrophysiological biomarkers in body representation research.