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Systematic Review: White Matter Microstructural Organization in Adolescents With Depression.

Petya D Radoeva1,2, Victor T Milev3, Jeffrey I Hunt1,2

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Summary
This summary is machine-generated.

Adolescents with depression show altered white matter microstructure, particularly in brain regions connecting key areas. This systematic review highlights differences in fractional anisotropy in critical white matter tracts.

Keywords:
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Area of Science:

  • Neuroscience
  • Psychiatry
  • Developmental Psychology

Background:

  • Depression is a significant mental health concern in adolescents.
  • Neural mechanisms underlying adolescent depression are increasingly studied.
  • White matter microstructure plays a crucial role in brain development and function.

Purpose of the Study:

  • To systematically review white matter microstructural differences in adolescents with and without depressive disorders.
  • To identify specific white matter regions affected in adolescent depression using diffusion imaging.

Main Methods:

  • Systematic literature search of PubMed and PsycINFO databases.
  • Inclusion of original research papers comparing diffusion tensor/spectrum imaging findings in adolescents (ages 11-21) with and without depression.
  • Adherence to PRISMA guidelines and PROSPERO registration for systematic review rigor.

Main Results:

  • 14 studies involving 824 adolescents with depression and 686 controls were included.
  • Significant differences in fractional anisotropy (FA) were observed in the uncinate fasciculus, cingulum, anterior corona radiata, inferior fronto-occipital fasciculus, and corpus callosum.
  • Most studies reported decreased FA in adolescents with depression, suggesting aberrant white matter integrity.

Conclusions:

  • Adolescents with depression exhibit aberrant white matter microstructure in limbic-cortical-striatal-thalamic circuits and the corpus callosum.
  • Findings suggest disruptions in brain connectivity associated with depressive disorders in this age group.
  • Future research should explore developmental trajectories, heterogeneity, and multimodal imaging integration in adolescent depression.