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Related Concept Videos

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...
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 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...
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.
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,...
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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Updated: Jul 5, 2026

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

Building meaning in schizophrenia.

Gina R Kuperberg1

  • 1Department of Psychology, Tufts University, Medford, Massachusetts, USA. kuperber@nmr.mgh.harvard.edu

Clinical EEG and Neuroscience
|May 3, 2008
PubMed
Summary
This summary is machine-generated.

Schizophrenia patients exhibit disrupted meaning construction due to aberrant semantic memory processing. This leads to abnormal neural activity patterns in language and visual event comprehension.

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Area of Science:

  • Cognitive Neuroscience
  • Neuroimaging
  • Psychiatry

Background:

  • Schizophrenia is characterized by cognitive deficits, including thought disorder, hallucinations, and delusions.
  • Understanding the neural basis of meaning construction is crucial for schizophrenia research.

Purpose of the Study:

  • To investigate abnormalities in neural activity during meaning construction in schizophrenia.
  • To elucidate the temporal and spatial patterns of brain activity using event-related potentials and functional magnetic resonance imaging.

Main Methods:

  • Utilized event-related potentials (ERPs) and functional magnetic resonance imaging (fMRI).
  • Examined neural activity during language comprehension (within and across sentences) and visual event comprehension.
  • Compared thought-disordered patients, non-thought-disordered patients, and healthy controls.

Main Results:

  • Thought-disordered patients show faster, broader semantic memory activation and inappropriate temporal cortex recruitment.
  • Sentence comprehension is biased towards semantic memory over semantic-syntactic integration, with altered prefrontal and parietal cortex activity.
  • Discourse comprehension involves delayed coherence linking and aberrant recruitment of temporal and prefrontal cortices.
  • Visual event comprehension shows reduced neural activity in identifying goal-directed actions, with semantic memory dominance.

Conclusions:

  • Schizophrenia involves widespread disruptions in meaning construction, driven by aberrant semantic memory processing.
  • These neural abnormalities affect language comprehension, discourse processing, and visual event understanding.
  • Findings highlight the role of semantic memory dysregulation in the pathophysiology of schizophrenia.