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  2. Hallucination - Wikipedia

    en.wikipedia.org/wiki/Hallucination

    A hallucination is a perception in the absence of an external stimulus that has the compelling sense of reality. [6] They are distinguishable from several related phenomena, such as dreaming (), which does not involve wakefulness; pseudohallucination, which does not mimic real perception, and is accurately perceived as unreal; illusion, which involves distorted or misinterpreted real ...

  3. Psychosis - Wikipedia

    en.wikipedia.org/wiki/Psychosis

    In Cambodia, hallucinations are linked with spirit visitation, a term they call "cultural kindling". [118] These examples of differences are attributed to culture and the way it shapes conceptions of mental disorders. [116] These cultural differences can be useful in bridging the gap of cultural understanding and psychiatric signs and symptoms ...

  4. Signs and symptoms - Wikipedia

    en.wikipedia.org/wiki/Signs_and_symptoms

    Signs and symptoms are also applied to physiological states outside the context of disease, as for example when referring to the signs and symptoms of pregnancy, or the symptoms of dehydration. Sometimes a disease may be present without showing any signs or symptoms when it is known as being asymptomatic . [ 13 ]

  5. Psychotic depression - Wikipedia

    en.wikipedia.org/wiki/Psychotic_depression

    People with psychotic depression experience the symptoms of a major depressive episode, along with one or more psychotic symptoms, including delusions and/or hallucinations. [2] Delusions can be classified as mood congruent or incongruent, depending on whether or not the nature of the delusions is in keeping with the individual's mood state. [2]

  6. Schizophrenia - Wikipedia

    en.wikipedia.org/wiki/Schizophrenia

    In the early 20th century, the psychiatrist Kurt Schneider categorized the psychotic symptoms of schizophrenia into two groups: hallucinations and delusions. The hallucinations were listed as specific to auditory and the delusions included thought disorders. These were seen as important symptoms, termed first-rank. The most common first-rank ...

  7. Stimulant psychosis - Wikipedia

    en.wikipedia.org/wiki/Stimulant_psychosis

    Stimulant psychosis is a mental disorder characterized by psychotic symptoms (such as hallucinations, paranoid ideation, delusions, disorganized thinking, grossly disorganized behaviour). It involves and typically occurs following an overdose or several day binge on psychostimulants , [ 1 ] although it can occur in the course of stimulant ...

  8. Category:Hallucinations - Wikipedia

    en.wikipedia.org/wiki/Category:Hallucinations

    Articles relating to hallucinations, perceptions in the absence of an external stimulus that have the qualities of real perceptions. Hallucinations are vivid, substantial, and are perceived to be located in external objective space. Hallucinations are a combination of 2 conscious states of brain wakefulness and REM sleep.

  9. Substance-induced psychosis - Wikipedia

    en.wikipedia.org/wiki/Substance-induced_psychosis

    Psychosis manifests as disorientation, visual hallucinations and/or haptic hallucinations. [2] It is a state in which a person's mental capacity to recognize reality, communicate, and relate to others is impaired, thus interfering with the capacity to deal with life's demands. [3]