COMPUTER-BASED ELECTROENCEPHALOGRAPHY - TECHNICAL BASICS, BASIS FOR NEW APPLICATIONS, AND POTENTIAL PITFALLS

EEG has been recorded on paper-based analog systems for over 50 years. In the past 5 years, computer-based digital systems have become more widely used. Digital systems eliminate some artifacts that plagued ana log recordings but introduce subtle new problems including aliasing an d dynamic range. Digital systems allow reformatting of the same EEG se gment using different gain, filter and montage settings. The digital s ignal allows for measurement and computations on the EEG, leading to a pplications such as power spectrum, topographic mapping, and spike or seizure detection. (C) 1998 Elsevier Science Ireland Ltd.