Summary
EEG activities with open eyes in a quiet state (OA), during the pseudo-Raven's test (PRA), in hypnagogic state (HYP) and in the course of REM sleep (REM) are characteristic by nearly flat curves. We observed the states with eyes closed (OC), with hyperventilation (HV), during mental activity of calculation (CAL) and in NONREM 1 sleep (NR 1). 24 tested persons (probands) were investigated. We have found 8 typical states of EEG signals, which all have relation to attention and mental activity. Consequently, the EEG analysis can help in the differentiation between the above eight states. Using similar analyses, it is possible to discriminate all stages of NONREM and REM sleep without polysomnography.
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Extract
Vigilance and Hypnagogium Determination of Drivers by Eeg Analysis
1. Introduction
There is hardly no need to stress the importance of drivers wake fulness investigation because on their psychic state depends besides their own also the lives of other people. Monitoring the activity of the brain, the source of consciousness, is the tool for such investigation. Here, electroencephalography (EEG) represents only the laboratory method for reaching the data from which the information about the brain functions at a millisecond range can be obtained. Research in this line can be well used both in technical applications [3, 9, 12] (namely for monitoring vigilance of drivers and engine operators) in psychological practice [1, 4] as well as in neuropsychiatrie diagnostics [2, 5].However, as we know from everyday practice, Fourier harmonic analysis appropriately adapted for the EEG signals sometimes fails, particularly if there are very sma...See the full content of this document
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