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 language | English (US) |
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| Pages | 81-84 |
| Number of pages | 4 |
| State | Published - Jan 1 1998 |
| Event | Proceedings of the 1998 IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis - Pittsburgh, PA, USA Duration: Oct 6 1998 → Oct 9 1998 |
Other
| Other | Proceedings of the 1998 IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis |
|---|---|
| City | Pittsburgh, PA, USA |
| Period | 10/6/98 → 10/9/98 |
All Science Journal Classification (ASJC) codes
- General Engineering