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Local tissue anisotropy decreases in cerebellopetal fibers and pyramidal tract in multiple system atrophy

Kensuke Shiga1, Kei Yamada, Kenji Yoshikawa

  • 1Department of Neurology and Geriatrics, Department of Radiology, Kyoto Prefectural University of Medicine, Kaijicho 465 Kamigyo-ku, Kyoto, 601-0841, Japan. kenshiga@koto.kpu-m.ac.jp

Journal of Neurology
|April 19, 2005
PubMed
Abstract

Insights

Diffusion tensor imaging (DTI) reveals white matter degeneration in multiple system atrophy (MSA). Fractional anisotropy (FA) decreases in specific brain regions, correlating with disease severity, indicating DTI

Area of Science:

  • Neuroimaging
  • Neuropathology
  • Diffusion Tensor Imaging

Background:

  • Multiple system atrophy (MSA) is characterized by white matter pathology, including myelin loss and glial changes.
  • Tissue microstructure alterations in MSA affect water molecule diffusion.
  • Diffusion tensor imaging (DTI) can assess these microstructural changes.

Purpose of the Study:

  • To investigate white matter degeneration in multiple system atrophy (MSA).
  • To explore the utility of DTI in evaluating MSA-related white matter pathology.

Main Methods:

  • Studied 11 patients with probable MSA and 10 age-matched controls.
  • Utilized DTI to measure fractional anisotropy (FA) in key brain regions: MCP, basis pontis, internal capsule, SCP, and corpus callosum.

Main Results:

  • FA values were significantly decreased in the MSA group in the middle cerebellar peduncle (MCP), basis pontis, and internal capsule compared to controls.
  • No significant differences in FA were observed in the superior cerebellar peduncle (SCP) or corpus callosum.
  • Decreased FA in the MCP negatively correlated with ataxia severity in MSA patients.

Conclusions:

  • DTI effectively identifies white matter degeneration in MSA, corresponding to pathologically vulnerable areas.
  • Reduced tissue anisotropy in the MCP, as measured by DTI, correlates with functional disability in MSA.
  • DTI is a viable in vivo tool for assessing white matter pathology in multiple system atrophy.

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