Automated data acquisition and analysis of neural evoked potentials

A software system to collect, analyze and store trains of neural evoked potentials is presented. Real-time waveform capture permits sampling of a variable-duration data window of 6 to 399.6 ms with a sample delay accurately adjustable up to 1 001 ms (20 microseconds resolution). The digitized representation of each waveform is stored for individual analysis. Off-line processing determines 17 parameters of each waveform, including an arrow-selected amplitude and time. Individual processing of waveforms preserves all degrees of freedom for statistical analysis across waveforms. Ensemble averages may optionally be formed from the individual waveforms with processing performed on the averaged responses. The software provides MENU-selectable support functions including stimulus-to-artifact timing, storage and retrieval of data and calculated parameters, digital display of waveforms, data calibration and gain modification, table referenced data editing, file management, simple statistics, hardcopy output, and optional database interfacing with output formatted for compatibility with a statistics package (SAS).