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Related Concept Videos

Biological Causes of Schizophrenia01:29

Biological Causes of Schizophrenia

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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
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Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders01:27

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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.
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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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Schizophrenia01:17

Schizophrenia

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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...
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Functional Brain Systems: Limbic System01:15

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The limbic system, often called the "emotional brain," is a complex set of structures located deep within the brain. The intricate network of the limbic system supports a wide range of psychological functions, from emotional regulation to memory formation and sensory processing. This functional brain region encompasses specific parts of the diencephalon and the cerebrum, integrating the higher mental functions of the cerebral cortex with the primitive emotional responses of the deep brain...
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The reticular formation is a complex network of gray and white matter located within the brainstem extending from the medulla to the midbrain.
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Standardized Data Acquisition for Neuromelanin-Sensitive Magnetic Resonance Imaging of the Substantia Nigra
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Modular-level alterations of structure-function coupling in schizophrenia connectome.

Yu Sun1, Zhongxiang Dai1, Junhua Li1

  • 1Singapore Institute for Neurotechnology (SINAPSE), Centre for Life Science, National University of Singapore, Singapore.

Human Brain Mapping
|December 30, 2016
PubMed
Summary
This summary is machine-generated.

Schizophrenia patients exhibit altered brain connectivity, with abnormal structural and functional connections impacting network organization. These SC-FC coupling changes are linked to illness severity and symptoms.

Keywords:
diffusion tensor imaging (DTI)modular architectureresting-state fMRIschizophreniastructural-functional coupling

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Medical Imaging

Background:

  • Schizophrenia is linked to brain dysconnectivity and abnormal network organization.
  • Discrepancies exist between structural connectivity (SC) and functional connectivity (FC) studies in schizophrenia.
  • The relationship between structural and functional brain deficits in schizophrenia is not well understood.

Purpose of the Study:

  • To investigate the relationship between structural connectivity (SC) and functional connectivity (FC) in schizophrenia.
  • To identify group differences in SC-FC coupling within functional brain modules.
  • To correlate SC-FC coupling abnormalities with clinical symptoms and illness duration in schizophrenia patients.

Main Methods:

  • Resting-state functional magnetic resonance imaging (fMRI) and diffusion tensor imaging (DTI) were used.
  • Functional and structural brain networks were constructed for 19 schizophrenia patients and 17 healthy controls.
  • Graph theory was applied to analyze network modularity and SC-FC coupling within modules.

Main Results:

  • Schizophrenia patients showed significantly reduced network modularity compared to controls.
  • Altered SC-FC coupling patterns were observed across different functional modules.
  • Increased SC-FC coupling was found in default mode and central modules; decreased coupling in occipital and subcortical modules.

Conclusions:

  • Module-dependent alterations in SC-FC coupling may underlie abnormal brain function in schizophrenia.
  • SC-FC coupling changes correlate with illness duration and clinical symptom severity.
  • Multimodal neuroimaging biomarkers could aid in schizophrenia diagnosis and severity assessment.