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Related Concept Videos

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...
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Disrupted Intersubject Variability Architecture in Functional Connectomes in Schizophrenia.

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Schizophrenia patients show altered functional brain connectivity variability, particularly in sensorimotor and auditory regions. This altered connectivity correlates with clinical factors and may explain schizophrenia

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Medical Imaging

Background:

  • Schizophrenia (SCZ) is a complex disorder with significant patient variability.
  • Previous neuroimaging studies focused on group averages, overlooking individual differences in brain connectivity.

Purpose of the Study:

  • To investigate intersubject variability of the functional connectome (IVFC) in schizophrenia patients.
  • To explore the relationship between IVFC and clinical characteristics in SCZ.
  • To determine the specificity of IVFC alterations in SCZ compared to bipolar disorder (BD) and major depressive disorder (MDD).

Main Methods:

  • Acquired resting-state functional MRI data from 121 SCZ patients and 183 healthy controls (HCs).
  • Analyzed whole-brain functional connectome intersubject variability (IVFC).
  • Used permutation analysis for group comparisons and correlated IVFC with clinical variables and datasets from BD and MDD patients.

Main Results:

  • The overall IVFC pattern in SCZ was similar to HCs.
  • SCZ patients exhibited higher IVFC in sensorimotor, visual, auditory, and subcortical regions compared to HCs.
  • Altered IVFC in SCZ negatively correlated with age of onset, illness duration, and symptom severity, and positively with clinical heterogeneity.
  • IVFC alterations in sensorimotor, auditory, and subcortical regions were specific to SCZ, while visual cortex alterations were shared with BD and MDD.

Conclusions:

  • Altered whole-brain IVFC in SCZ is linked to its high clinical heterogeneity.
  • These findings suggest potential for individualized diagnosis and treatment strategies in schizophrenia.
  • Specific IVFC alterations may serve as biomarkers differentiating SCZ from other psychiatric disorders.