Perception of postural instability as revealed by Morlet wavelet transform in EEG

Semyon Slobounov, R. L. Tutwiler, E. Slobounova, S. Fedon

Research output: Contribution to conferencePaperpeer-review

1 Scopus citations

Abstract

Our principal finding from this study is that there were changes at the level of brain electrical activity (EEG), in time-frequency domain, during states of perceptual detection of postural instability of the Virtual Person. The Morlet wavelet transform was applied to examine phase-locking transition within 10-40 Hz frequencies range as a function of change in the focused attention during perceptual tasks aimed to detect non-stable postural dynamics. It was found that high energy 40 Hz time-frequency cluster at fronto-central area was preceded by 20 Hz signal activity and followed by a 30 Hz signal cluster when subjects detect non-stable postures. This fortifies the use of the time-frequency analysis as an invaluable tool for detection, estimation and tracking the event-related EEG frequency distributions.

Original languageEnglish (US)
Pages81-84
Number of pages4
StatePublished - Jan 1 1998
EventProceedings of the 1998 IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis - Pittsburgh, PA, USA
Duration: Oct 6 1998Oct 9 1998

Other

OtherProceedings of the 1998 IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis
CityPittsburgh, PA, USA
Period10/6/9810/9/98

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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