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Evoked Potentials in Psychopathology and Psychiatric Treatment

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Abstract

Electrical signals that reflect several kinds of cerebral responses can be recorded from the intact human scalp by the use of time-coherent signal averaging. Sensory evoked potentials are the best known of these phenomena, but several other kinds of activity are encompassed under the more generic term of “event-related potentials” (ERP) (Vaughan 1969). ERPs also include the time-coherent cerebral electrical events related to motor acts (Vaughan, Costa, and Ritter 1968), the slow potential shifts associated with such phenomena as expectancy (Walter et al. 1964) and with the intention to move (Kornhuber and Deecke 1965), and potentials accompanying such complex psychological processes as those involved in stimulus recognition (Sutton, Braren, and Zubin 1965). In addition to ERPs of cerebral origin, there are several that originate outside of the brain; the sources of some of these are ocular movements, muscle twitches, aspects of the electrocardiogram, movements of the tongue, and galvanic skin responses (GSR). Special precautions, sometimes of rather complex nature, must be taken to distinguish between the desired signals of brain origin and those arising in extracerebral structures.

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Shagass, C. (1975). Evoked Potentials in Psychopathology and Psychiatric Treatment. In: Burch, N., Altshuler, H.L. (eds) Behavior and Brain Electrical Activity. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-4434-6_21

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