Weighted Phase Lag Index Stability as an Artifact Resistant Measure to Detect Cognitive EEG Activity During Locomotion

Abstract

High-density electroencephalography (EEG) with active electrodes allows for monitoring of electrocortical dynamics during human walking but movement artifacts have the potential to dominate the signal. One potential method for recovering cognitive brain dynamics in the presence of gait-related artifact is the Weighted Phase Lag Index. Methods We tested the ability of Weighted Phase Lag Index to recover event-related potentials during locomotion. Weighted Phase Lag Index is a functional connectivity measure that quantified how consistently 90 deg (or 270 deg) phase 'lagging' one EEG signal was compared to another. 248-channel EEG was recorded as eight subjects performed a visual oddball discrimination and response task during standing and walking (0.8 or 1.2 m/s) on a treadmill.

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Document Details

Document Type
Technical Report
Publication Date
Jul 24, 2012
Accession Number
ADA565353

Entities

People

  • Daniel P. Ferris
  • Joseph T. Gwin
  • Kaleb G. McDowell
  • Troy M. Lau

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Amplitude
  • Artifacts
  • Brain
  • Brain-Computer Interfaces
  • Data Science
  • Discrimination
  • Dynamics
  • Electrodes
  • Electroencephalography
  • Engineering
  • Frequency Bands
  • Information Science
  • Locomotion
  • Military Research
  • Monitoring
  • Neurosciences
  • Neurotechnology

Fields of Study

  • Psychology

Readers

  • Brain and Cognitive Science; Experimental Psychology; Cognitive Neuroscience
  • Control Systems Engineering.
  • Exercise and Sports Science.