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Related Concept Videos

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,...
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.
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...
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...
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...
Biological Causes of Schizophrenia01:29

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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.

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Related Experiment Video

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Development of a Virtual Reality Assessment of Everyday Living Skills
10:32

Development of a Virtual Reality Assessment of Everyday Living Skills

Published on: April 23, 2014

Neuropsychological functioning in first-episode schizophrenia.

Eugenia Kravariti1, Kevin Morgan, Paul Fearon

  • 1Department of Psychiatry, NIHR Biomedical Research Centre for Mental Health, South London and Maudsley NHS Foundation Trust and Institute of Psychiatry, King's College London, London. e.kravariti@iop.kcl.ac.uk

The British Journal of Psychiatry : the Journal of Mental Science
|October 2, 2009
PubMed
Summary

First-episode schizophrenia patients exhibit significant neurocognitive deficits in executive function, processing speed, and verbal memory compared to intellectually matched controls. These findings aid in understanding schizophrenia subtypes.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Cognitive Psychology

Background:

  • Identifying neurocognitive subtypes in schizophrenia is crucial for understanding the disorder's neurobiology.
  • Intellectual function differences often complicate comparisons between schizophrenia patients and controls.
  • This study addresses confounding factors by using intellectually matched groups.

Purpose of the Study:

  • To investigate neuropsychological performance in first-episode schizophrenia patients.
  • To compare performance with intellectually matched community controls.
  • To examine performance across different intellectual trajectories within the schizophrenia group.

Main Methods:

  • 101 individuals with first-episode schizophrenia/schizoaffective disorder and 317 controls were assessed.
  • Participants were categorized into 'stable good', 'deteriorated poor', and 'stable poor' intellectual groups based on IQ and reading tests.
  • Neuropsychological function was compared between intellectually matched schizophrenia and control subgroups.

Main Results:

  • Schizophrenia patients consistently showed deficits in executive function, processing speed, and verbal memory compared to controls.
  • Visual/spatial perception and memory were not significantly different between groups.
  • Effect sizes for deficits ranged from small to large across the stable good, deteriorated poor, and stable poor schizophrenia subgroups, respectively.

Conclusions:

  • First-episode schizophrenia/schizoaffective disorder is associated with widespread neurocognitive deficits.
  • These deficits are evident in executive function, processing speed, and verbal memory when compared to intellectually matched controls.
  • Findings support the utility of neurocognitive profiling for understanding schizophrenia heterogeneity.