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Related Concept Videos

Brain Imaging01:14

Brain Imaging

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Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
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Bipolar disorder is a chronic mental health condition marked by significant mood fluctuations, including episodes of mania and depression. Elevated energy levels, heightened mood or irritability, impulsive behavior, reduced sleep needs, rapid speech, racing thoughts, inflated self-esteem, and distractibility characterize mania. Individuals with bipolar disorder often alternate between depressive and manic states, with periods of emotional stability lasting an average of six months to a year.
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Related Experiment Video

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Probing the Brain in Autism Using fMRI and Diffusion Tensor Imaging
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White matter microstructural abnormalities in bipolar disorder: A whole brain diffusion tensor imaging study.

Marina Barysheva1, Neda Jahanshad, Lara Foland-Ross

  • 1Imaging Genetics Center, Laboratory of Neuro Imaging, Dept. of Neurology, UCLA School of Medicine, Los Angeles, CA, USA.

Neuroimage. Clinical
|November 2, 2013
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Summary
This summary is machine-generated.

This study found widespread white matter abnormalities in euthymic bipolar disorder patients using diffusion tensor imaging. These findings highlight structural differences in brain connectivity associated with bipolar disorder.

Keywords:
Bipolar disorderBrain mappingDTIFractional anisotropyNeuroimagingWhite matter

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Area of Science:

  • Neuroimaging
  • Psychiatry
  • Brain Anatomy

Background:

  • Bipolar disorder (BD) is a chronic mental illness causing severe mood and cognition disruptions.
  • Diffusion tensor imaging (DTI) suggests white matter (WM) tract abnormalities may underlie BD symptoms.
  • This study investigated WM anomalies in euthymic, lithium-free BD patients.

Purpose of the Study:

  • To map the profile of white matter anomalies in bipolar disorder using DTI.
  • To identify specific WM tracts affected in euthymic bipolar patients.
  • To compare WM integrity between bipolar patients and healthy controls.

Main Methods:

  • Acquired diffusion-weighted and T1-weighted MRI scans from 23 bipolar I patients and 19 controls.
  • Processed scans to measure fractional anisotropy (FA), mean diffusivity (MD), and radial diffusivity (RD).
  • Utilized whole-brain voxel-based analysis and nonlinear alignment for statistical group comparisons.

Main Results:

  • Bipolar group exhibited significantly lower FA in widespread WM regions, including the corpus callosum, cortical, and thalamic association fibers.
  • Elevated MD and RD were observed in many of the same WM regions in bipolar patients compared to controls.
  • Specific abnormalities were noted in the tapetum, fornix, and stria terminalis.

Conclusions:

  • Findings confirm prior reports of WM abnormalities in the corpus callosum in bipolar disorder.
  • This study links bipolar diagnosis to structural abnormalities in the tapetum, fornix, and stria terminalis.
  • Further research is warranted to explore the diagnostic specificity and prognostic value of these WM alterations.