Problems in Identifying an Acoustically Evoked Potential to a Single Stimulus
Arthur J. Derbyshire, Stan B. Osenar, L. R. Hamilton, Maurice E. Joseph · Journal of Speech and Hearing Research · 1971
The identification of evoked scalp potentials in man to a single acoustic stimulus such as a word becomes possible by combining several techniques. Either multiple EEG derivations from one subject or single derivations from several subjects, can be summed algebraically to yield a tracing with a significant increase (by a factor of 2 or more) in the size of the response relative to the background. A specific template has been found which, when cross correlated with the EEG, yields 2 dimensional (correlation and time) description of when the response occurs.