Psychiatry, thus, involves the diagnosis and treatment of what Lilienfeld (1879: 280) termed "physiological social pathology", and may be classed as a subfield of sociophysiology, called "pathological sociophysiology" by Zeliony (1912: 405).
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Although Zeliony (1912: 406) attributes the term "sociophysiology" to Russian philosopher A. I. Wedensky, Paul von Lilienfeld, in 1879, published a book titled Social Physiology, which uses throughout the unified concept, conjoined with a dash, "social-physiology" social-physiologie in addition to the modified substantive, separated by a space, "social physiology" sociale Physiologie.