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Related Concept Videos

Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders01:27

Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders

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.
Researchers have identified genetic factors that increase susceptibility to schizophrenia, underscoring the intricate interplay between genetics and environment in disease development. At the core of schizophrenia's pathophysiology is excessive dopaminergic neurotransmission within the...
Biological Causes of Schizophrenia01:29

Biological Causes of Schizophrenia

Schizophrenia, a severe psychiatric disorder, arises from a complex interplay of biological factors, including genetic predisposition, structural brain abnormalities, neurotransmitter dysregulation, and developmental irregularities. These factors collectively contribute to the onset and progression of the disorder, which typically manifests in late adolescence or early adulthood.
Genetic Factors in Schizophrenia
The genetic basis of schizophrenia is strongly supported by family and twin studies.
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.
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Disorganized and unusual thought processes mark thought disorders in schizophrenia. One key feature is disorganized speech, where an individual's conversation includes loosely...
Schizophrenia01:17

Schizophrenia

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.
Psychological and Sociocultural Causes of Schizophrenia01:29

Psychological and Sociocultural Causes of Schizophrenia

Schizophrenia, a complex psychiatric disorder, has been historically misunderstood. Early psychological theories attributed its origins to childhood trauma and unresponsive parenting. However, contemporary research largely rejects these notions, favoring the vulnerability-stress hypothesis. This model proposes that individuals with a genetic predisposition to schizophrenia may develop the disorder following exposure to significant environmental stressors. Notably, studies on high-risk...
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Negative symptoms of schizophrenia indicate a reduction or absence of typical behaviors and emotional responses found in healthy individuals, while positive symptoms reflect an excess or distortion of normal functioning.
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Updated: Jul 5, 2026

Standardized Data Acquisition for Neuromelanin-Sensitive Magnetic Resonance Imaging of the Substantia Nigra
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Disrupted-in-Schizophrenia-1.

Walter J Muir1, Benjamin S Pickard, Douglas H R Blackwood

  • 1Division of Psychiatry, School of Molecular and Clinical Medicine, University of Edinburgh, Kennedy Tower, Royal Edinburgh Hospital, Morningside Park, Edinburgh, Scotland EH10 5HF, United Kingdom. walter.muir@ed.ac.uk

Current Psychiatry Reports
|May 14, 2008
PubMed
Summary
This summary is machine-generated.

Investigating chromosomal abnormalities in a family with psychiatric illness led to the discovery of the DISC1 gene. This gene is a key candidate for schizophrenia and affective disorders.

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Published on: November 21, 2013

Area of Science:

  • Genetics and Psychiatry

Background:

  • Chromosomal abnormalities are valuable in identifying disease risk genes.
  • A family study involving a chromosome translocation linked to severe psychiatric illness was crucial.

Purpose of the Study:

  • To review the discovery of the Disrupted-in-Schizophrenia-1 (DISC1) gene.
  • To present evidence for DISC1's role in schizophrenia and affective disorders.
  • To discuss the neuronal functions of the DISC1 protein.

Main Methods:

  • Analysis of chromosomal translocations in affected families.
  • Genetic association studies in patient populations.
  • Review of existing literature on DISC1 function.

Main Results:

  • The study of a chromosomal translocation directly led to the identification of the DISC1 gene.
  • DISC1 is a significant candidate risk gene for schizophrenia and affective disorders.
  • Evidence supports DISC1's importance in the broader population.

Conclusions:

  • DISC1 is a critical gene implicated in psychiatric disorders.
  • Understanding DISC1's function offers insights into neuronal processes and disease mechanisms.