Day by day variations of the amount of spike-wave activity in 24 hour cassette recordings.
For interpretation of mobile long-term EEG monitoring in patients suffering from absence epilepsies with regular spike-wave (S-W) paroxysms, the fluctuating amount of this parameter has to be taken into account if, for example, therapeutic effects are to be judged. An 'S-W variogram' is derived resembling the statistical properties of the day by day variability as an orienting criterion in this respect.
D002940:Circadian Rhythm; D004569:Electroencephalography; D004827:Epilepsy / Q000503:physiopathology*; D006801:Humans; D008991:Monitoring, Physiologic; D013223:Statistics as Topic; D013637:Tape Recording