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This book is a collection of 49 independent articles systematically organized and published as volume 3 in a series of books entitled Frontiers in Neuroscience. All of the articles reflect current trends in research on electrical (and magnetic) responses that are detectable noninvasively from the surface of the human body by appropriate stimulation, ie, evoked responses. This area of research depends on the use of electronic computers because they can increase the signal-to-noise ratio sufficiently to detect these relatively small signals, usually a few microvolts or less. The book includes research representing all major neurologic systems in which this approach is clinically useful at present—visual, auditory, somatosensory, vestibular, motor, and perceptual systems.
All of these responses depend on the type of stimulus used, and stimulation is especially sophisticated in vision research. Three distinctly different types of visual stimuli are now being used: (1) brief flashes, usually full field or
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