This article is one of a series of reports on studies of a certain psychopathologic picture occurring in schizophrenia. It was previously observed that some schizophrenic patients present a number of symptoms which are not likely to occur alone but are observed only in association with each other. The association of these symptoms in a consistent fashion seems to be indicative of a hitherto undescribed syndrome and therefore to merit closer study.
The principal components of the syndrome in question are: 1. Severe disturbances of self-awareness: These are manifested in a great variety of complaints, of which the most important is the impression of being divided into two or more persons, and various symptoms of depersonalization.
2. The experience of motor influences and the impression of passivity: This disturbance is manifested in such complaints as: "They move my arm." "It is not I who is talking; the words just fly
Angyal A. DISTURBANCES OF ACTIVITY IN A CASE OF SCHIZOPHRENIA. Arch NeurPsych. 1937;38(5):1047-1054. doi:10.1001/archneurpsyc.1937.02260230145009