Chapter 24.Psychosis
Sections
Excerpt
Clinicians have defined the term psychosis in different ways over the last two centuries. This term has been used variously as a synonym for “gross impairment in reality testing” or “loss of ego boundaries” sufficient to interfere with the capacity to meet the demands of daily life; to denote the presence of delusions and/or hallucinations; to indicate a category of psychiatric illnesses (“the psychoses”); to describe the severity of delusional and “thought disorder” symptomatology; and, more recently, to refer to a spectrum of cognitive, emotional, behavioral, and motoric symptoms and signs, each of which varies in character and severity in any given patient (Arciniegas 2015).
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