A Hybrid Broad-Band EEG Frequency Analyzer for Use in Long-Term Experiments

A broad-band EEG frequency analyzer system is described which has been designed for the continuous analysis of experiments lasting several hours. It allows the quantitative measurement of the time course of the effects of various centrally active drugs on the EEG. Analog frequency analysis coupled with digital output provides an efficient means of data collection. Subsequent reduction of data is a accomplished by statistical techniques described elsewhere.