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Functional connectivity density alterations in schizophrenia.

Chuanjun Zhuo1, Jiajia Zhu2, Wen Qin2

  • 1Department of Radiology and Tianjin Key Laboratory of Functional Imaging, Tianjin Medical University General Hospital Tianjin, China ; Functional Neuroimaging Laboratory, Department of Psychiatry, Tianjin Mental Health Center, Tianjin Anding Hospital Tianjin, China ; Tianjin Anning Hospital Tianjin, China.

Frontiers in Behavioral Neuroscience
|December 6, 2014
PubMed
Summary
This summary is machine-generated.

Schizophrenia patients exhibit altered resting-state functional connectivity density (rsFCD). Key brain regions like the striatum and hippocampus showed increased rsFCD, while sensorimotor and occipital cortices showed decreased rsFCD.

Keywords:
functional connectivity densityfunctional connectivity strengthfunctional magnetic resonance imagingresting stateschizophrenia

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Medical Imaging

Background:

  • Schizophrenia is marked by disrupted brain connectivity.
  • Previous research focused on connectivity strength, neglecting connectivity density.
  • Resting-state functional connectivity density (rsFCD) alterations in schizophrenia are understudied.

Purpose of the Study:

  • To investigate changes in rsFCD in schizophrenia patients.
  • To compare rsFCD between schizophrenia patients and healthy controls.

Main Methods:

  • Used resting-state functional MRI (fMRI) on 95 schizophrenia patients and 93 healthy controls.
  • Calculated rsFCD, representing total brain connections per voxel.
  • Performed voxel-based analysis to find significant rsFCD differences.

Main Results:

  • Schizophrenia patients had increased rsFCD in bilateral striatum and hippocampus.
  • Patients showed decreased rsFCD in bilateral sensorimotor cortices and right occipital cortex.
  • No correlation found between rsFCD and antipsychotic dosage, illness duration, or symptom severity.

Conclusions:

  • Striatal, hippocampal, and parietal-occipital regions show distinct rsFCD changes in schizophrenia.
  • These changes may relate to dopamine activity, supporting the connectivity disorder hypothesis.
  • Findings enhance understanding of schizophrenia's neural mechanisms.