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July 1920

ELECTROMYOGRAPHIC STUDIES OF MUSCLES DURING HYSTERICAL CONTRACTION

Arch NeurPsych. 1920;4(1):8-15. doi:10.1001/archneurpsyc.1920.02180190011002
Abstract

This short communication is written to put forward some laboratory evidence that the involuntary muscular contractions in hysterical conditions are physiologically similar to normal, conscious muscular contractions. From the clinical standpoint their similarity has, of course, been conceded for a long time. In any discussion of hysteria, however, it must be remembered that one is dealing with a complex disease, the pathology of which is psychologic; in other words, this pathology has its seat in the most highly integrated part of the organism. The question in such a piece of work as this is what difference, if any, one might find in the muscular contractions in states of normal psychobiologic integration as compared to the muscular contractions in states of hysterical malintegration.

Action-currents are slight changes of electrical potential concomitant with all forms of biologic activity. A record of the actioncurrents of a contracting muscle as recorded by the string-galvanometer

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