Averaged Somatosensory Evoked Responses in Various Psychiatric Disorders
Earlier studies comparing somatosensory-response characteristics of psychiatric patients with those of healthy subjects yielded two main positive findings. Amplitude of the “primary” response was greater [1, 2], and its recovery function was attenuated in certain kinds of patients [3–5]. These studies did not adequately take into account several factors later shown to be important, i.e., age, sex, and certain requirements for mathematical treatment of recovery-function data. Observations were also restricted to the “primary” components, and only amplitude was evaluated; latency was not considered. The present study was carried out in order to check the validity of previous findings with all available methodological controls, and to extend the observations to include later evoked-response events and latency measures.
KeywordsPersonality Disorder Psychiatric Patient Interstimulus Interval Inter Stimulus Interval Recovery Curve
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