is often very difficult and useless). Patient's movements often become restricted, becoming catatonic for a short period: stereotypies – body-rocking, head banging, mutism, negativism (failure to cooperate or the active subversion of demands made of the patient), waxy flexibility, impulsive actions. Sometimes the patient's speech is completely incoherent, but sometimes they are able to answer questions, offering an opportunity for a physician to identify the nature of the patient's disorientation. Patients can be disoriented not only with respect to place and time, but also can be disoriented with respect to themselves and their own personality. Oneiroid syndrome most often occurs as the manifestation of an acute episode of schizophrenia. The duration of the oneiroid period is limited to a few weeks or days. The first signs of the beginning of a psychotic episode are sleep disorders and a growing sense of anxiety. The patient's concerns quickly reaches a level of total bewilderment. Vivid emotions and the phenomena of derealization serves as the basis for fragmentary, unsystematized delusions (acute picturesque delusion). The initial fear is soon replaced by an affect of amazement or sheer ecstasy. Patients quiet down, looking around with a keen interest in their surroundings, and become excited by colors and sounds. Later, patients develop catatonic stupor or catatonic agitation. The duration of the oneiroid episode is different from patient to patient. Often, spontaneous recovery occurs within a few weeks of onset. The termination of the psychosis is gradual: hallucinations disappear very quickly, but catatonic phenomena and irregular behavior sometimes persist for a long time. After the end of the psychosis, patient can describe some fragments of their psychopathological experiences, but this story is usually inconsistent. An oneiroid-schizophrenic state also can be induced by the Kandinsky-Clérambault syndrome. This is typical for people with paranoid schizophrenia who also suffer from the oneiroid syndrome. After leaving the oneiroid state, the patient may remember their fantastic experiences, but suffer amnesia about the real events that occurred in his life during this psychotic episode. Residual delusion may persist for a few days afterward. Prognosis Oneiroid catatonia is one of the most favorable schizophrenic psychoses, it poses minimal complications in the aftermath of an episode, and a patient can undergo treatment and recover without significant personality changes. Lethal catatonia During extremely strong breaks of consciousness, a patient may very rarely develop hyperthermia, accompanied by an increasing cerebral edema and impaired cardiac activity (known as