Abstract
The system for quantification of sleep EEG slow wave activity is a means of compressing the EEG information and presenting sleep trends. The rationale for the design of this instrument originates from computer studies into signal decomposition and variability of the EEG activity during a normal night of sleep. A digital, time interval, delta filter system sums and plots the amount of delta activity occurring in each 1 min epoch in discrete steps. A high degree of correspondence is apparent from the resulting plots between the depth of sleep and the delta activity level.
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