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Analysis of single trial movement-related brain macropotential

STS Instructor Authored by Giuseppe A. Chiarenza

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Check out this Knowledge Base article from StressTherapy Solutions: Analysis of single trial movement-related brain macropotential.

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Study at a glance

Area
QEEG, Methods & Mechanisms
Authors
Chiarenza GA, Cerutti S, Liberati D
Journal
International Journal of Psychophysiology
Year
1994
Participants
3
Protocol
autoregressive (ARX) single-trial modelling of movement-related potentials

Key findings

  • Single-trial estimation markedly improved signal-to-noise ratio
  • The same model also reduced ocular artefacts efficiently
  • Movement-related potentials varied substantially from trial to trial
  • Variability appeared related to movement programming and error evaluation; tested in only 3 people

DOI 10.1016/0167-8760(89)90043-3 → PubMed 8089035 →

Movement-related brain potentials are normally studied by averaging many trials, which hides how they change from one movement to the next. This methods paper presents a statistical modelling approach that uses the average as a template and treats ongoing EEG and eye activity as separate noise inputs, so the potential can be estimated on each single trial. Simulations and recordings showed a large gain in signal-to-noise ratio and effective removal of eye artefacts, and the single-trial potentials varied considerably, which the authors link to movement planning and error evaluation.