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Related Concept Videos

Schizophrenia01:17

Schizophrenia

626
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...
626
Biological Causes of Schizophrenia01:29

Biological Causes of Schizophrenia

416
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...
416
Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders01:27

Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders

1.7K
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...
1.7K
Psychological and Sociocultural Causes of Schizophrenia01:29

Psychological and Sociocultural Causes of Schizophrenia

402
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...
402
Positive Symptoms of Schizophrenia: Hallucinations and Delusions01:30

Positive Symptoms of Schizophrenia: Hallucinations and Delusions

442
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...
442
Negative and Cognitive Symptoms of Schizophrenia01:30

Negative and Cognitive Symptoms of Schizophrenia

347
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,...
347

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Modeling the Functional Network for Spatial Navigation in the Human Brain
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Functional network connectivity in early-stage schizophrenia.

Tom A Hummer1, Matthew G Yung2, Joaquín Goñi3

  • 1Department of Psychiatry, Indiana University School of Medicine, United States of America; Indiana University Psychotic Disorders Program, Indiana University School of Medicine, United States of America.

Schizophrenia Research
|February 11, 2020
PubMed
Summary
This summary is machine-generated.

Individuals with early-stage schizophrenia exhibit altered brain network connectivity, particularly reduced connections between distinct networks. Illness duration correlates with increased variability in these neural connections.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Brain Imaging

Background:

  • Schizophrenia is characterized by disrupted neural connections and impaired information integration.
  • Understanding disruptions in brain network connectivity is crucial for schizophrenia research.

Purpose of the Study:

  • To investigate whole-brain functional connectivity patterns in early-stage schizophrenia.
  • To compare within- and between-network connectivity in patients versus controls.

Main Methods:

  • Resting-state functional magnetic resonance imaging (fMRI) was used in 56 early-stage schizophrenia patients and 32 controls.
  • Functional connectivity was analyzed across 278 gray matter regions organized into nine distinct networks.
  • Global efficiency and hub locations were assessed to understand information processing.

Main Results:

  • Controls showed greater connectivity between several network pairs (e.g., somatomotor-default mode).
  • Schizophrenia patients displayed increased variance in ventral attention network interactions.
  • Patients had reduced global efficiency and different hub network distributions compared to controls.

Conclusions:

  • Schizophrenia is associated with reduced functional connectivity primarily between distinct brain networks.
  • Illness duration impacts the variability of network connections.
  • Findings offer insights into the pathophysiology of schizophrenia and information processing deficits.