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Related Concept Videos

Positive Symptoms Schizophrenia: Hallucinations and Delusions01:26

Positive Symptoms Schizophrenia: Hallucinations and Delusions

Schizophrenia is a complex psychiatric disorder characterized by a range of symptoms that significantly impact cognition, behavior, and emotional regulation. Among these, the positive symptoms stand out as they involve the addition or exaggeration of normal mental functions, deviating markedly from typical behavior and perception. Hallucinations and delusions are prominent positive symptoms, each profoundly affecting the individual's experience of reality.
Hallucinations
Hallucinations in...
Positive Symptoms of Schizophrenia: Hallucinations and Delusions01:30

Positive Symptoms of Schizophrenia: Hallucinations and Delusions

Schizophrenia is a complex mental health disorder that can manifest with various positive symptoms, including thought, movement, and behavior disorders. These symptoms significantly disrupt cognitive and motor functions, leading to profound effects on an individual's ability to engage with the world.
Thought Disorders
Disorganized and unusual thought processes mark thought disorders in schizophrenia. One key feature is disorganized speech, where an individual's conversation includes loosely...
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Hallucinogens are psychoactive substances that profoundly alter perceptual experiences, generating unreal visual and sensory images. Often referred to as psychedelic drugs — a term derived from the Greek words "psyche" (mind) and "delos" (revealing) — these substances include marijuana and lysergic acid diethylamide (LSD), among others. These drugs vary in intensity and effects.
Marijuana, derived from the dried leaves and flowers of the hemp plant, contains delta-9-tetrahydrocannabinol (THC)...
Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders01:27

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Schizophrenia is a neurodevelopmental disorder whose origins are rooted in complex genetic components. Despite our burgeoning understanding, the pathophysiology of this disorder remains incompletely deciphered.
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Psychosis: Goals of Pharmacotherapy

Antipsychotic drugs are a crucial treatment method for acute and chronic psychoses, bipolar illness, and behavioral disorders. The selection of these drugs depends on several factors, including the state of the disease, clinical judgment, possible drug interactions, and the patient's sensitivity to adverse effects. In immediate scenarios, such as delirium and dementia, short-term treatment with low doses of high-potency typical or atypical agents can effectively manage symptom exacerbation. For...
Schizophrenia01:17

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Schizophrenia, a term introduced by Swiss psychiatrist Eugen Bleuler in 1911, describes a severe psychological disorder marked by profound disruptions in attention, thought processes, language, emotion, and interpersonal relationships. The core feature of schizophrenia is psychosis — a state characterized by a fundamental detachment from reality. This disconnection manifests through distorted logic, impaired perception, and atypical behavior, severely affecting the lives of those diagnosed.

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Related Experiment Video

Updated: Jul 16, 2026

Handwriting Analysis Indicates Spontaneous Dyskinesias in Neuroleptic Naïve Adolescents at High Risk for Psychosis
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Hallucinatory disorder: preliminary data for a clinical diagnostic proposal.

Massimo C Mauri1, Isabel Valli, Veronica M S Ferrari

  • 1University of Milan Medical School, IRCCS Ospedale Maggiore di Milano, Milano, Italy. maurimc@policlinico.mi.it

Cognitive Neuropsychiatry
|March 14, 2007
PubMed
Summary

Chronic hallucinatory psychosis, characterized by auditory verbal hallucinations, may be a distinct diagnostic entity separate from schizophrenia. This finding suggests a new classification for hallucinatory disorders.

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Area of Science:

  • Psychiatry
  • Clinical Psychology
  • Neuroscience

Background:

  • Chronic hallucinatory psychosis is a recognized profile in French literature but absent in Anglo-American classifications.
  • This study investigates hallucinatory disorder as a potential distinct diagnostic entity.

Purpose of the Study:

  • To compare patients with chronic hallucinatory psychosis to those with schizophrenia.
  • To evaluate the diagnostic validity of hallucinatory disorder.

Main Methods:

  • Nine patients with chronic hallucinatory psychosis were compared to nine schizophrenia patients.
  • Clinical evaluations included SCID-P, GAF, BPRS, PANSS, SAPS, SANS, HRS-A, HRS-D, CDSS, MMSE, and CGI.

Main Results:

  • Schizophrenia presented with positive, negative, and disorganized symptoms.
  • Patients with hallucinatory disorder primarily experienced auditory verbal hallucinations with preserved other functions.

Conclusions:

  • Significant differences support hallucinatory disorder as a separate nosographic entity.
  • Auditory verbal hallucinations dominate the clinical picture of this disorder.