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Related Concept Videos

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...
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.
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.
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...
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...
Negative and Cognitive Symptoms of Schizophrenia01:30

Negative and Cognitive Symptoms of Schizophrenia

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.
Negative Symptoms
Negative symptoms of schizophrenia manifest as deficits in normal emotional and behavioral functioning, profoundly impacting daily life. Individuals with schizophrenia often display a flat affect, characterized by a near-total absence of emotional expression,...

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Handwriting Analysis Indicates Spontaneous Dyskinesias in Neuroleptic Naïve Adolescents at High Risk for Psychosis
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[Intermediate phenotype of schizophrenia].

Ryota Hashimoto1

  • 1Molecular Research Center for Children's Mental Development, United Graduate School of Child Development, Osaka University.

Nihon Rinsho. Japanese Journal of Clinical Medicine
|May 18, 2013
PubMed
Summary

Genes significantly contribute to schizophrenia. Intermediate phenotypes, which are heritable and measurable traits, help identify schizophrenia risk genes and understand brain mechanisms. This review covers the concept, work, and future of intermediate phenotypes.

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Area of Science:

  • Neuroscience
  • Genetics
  • Psychiatry

Context:

  • Schizophrenia is a complex disorder with significant genetic underpinnings.
  • Identifying specific genes contributing to schizophrenia risk is a major challenge.
  • The intermediate phenotype concept offers a framework to bridge genetic and clinical aspects of schizophrenia.

Purpose:

  • To review the concept and application of intermediate phenotypes in schizophrenia research.
  • To highlight recent advancements in identifying and utilizing intermediate phenotypes.
  • To discuss future directions for research on intermediate phenotypes and schizophrenia.

Summary:

  • Intermediate phenotypes are heritable, quantifiable traits associated with schizophrenia.
  • Examples include neurocognition, neuroimaging, and neurophysiology.
  • These phenotypes aid in identifying schizophrenia risk genes and understanding affected neural systems.

Impact:

  • Facilitates the discovery of novel schizophrenia risk genes.
  • Enhances understanding of the neural mechanisms underlying schizophrenia.
  • Provides a quantitative framework for genetic research in schizophrenia.