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White matter microstructural changes in psychogenic erectile dysfunction patients.

P Zhang1, J Liu, G Li

  • 1The Urology and Andrology Department, The 1st Teaching Hospital, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China.

Andrology
|April 9, 2014
PubMed
Summary

Psychological erectile dysfunction (ED) is linked to brain white matter (WM) changes, particularly in the corpus callosum. These microstructural alterations in WM correlate with ED symptom severity.

Keywords:
diffusion tensor imagingerectile dysfunctiontract-based spatial statisticswhite matter

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Area of Science:

  • Neuroimaging
  • Neurology
  • Psychiatry

Background:

  • Brain dysfunction is increasingly recognized in erectile dysfunction (ED).
  • Previous studies noted grey matter alterations in ED patients.
  • The cerebral white matter (WM) microstructural integrity in psychological ED requires further investigation.

Purpose of the Study:

  • To investigate white matter (WM) microstructural changes in psychological ED patients using diffusion tensor imaging (DTI).
  • To explore correlations between WM alterations and clinical variables, including symptom severity and duration.

Main Methods:

  • Magnetic resonance (MR) diffusion tensor imaging (DTI) scans were performed on 27 psychological ED patients and 27 healthy subjects (HS).
  • Tract-based spatial statistics (TBSS) were used to analyze WM structure.
  • DTI-derived indices (fractional anisotropy (FA), axial diffusivity (AD), mean diffusivity (MD)) were correlated with clinical assessments (IIEF-5, QEQ, SEAR).

Main Results:

  • Psychological ED patients exhibited altered WM microstructure compared to HS, with increased FA and reduced MD/AD values in several tracts.
  • Significant alterations were observed in the corpus callosum, corticospinal tract, internal capsule, corona radiata, external capsule, and superior longitudinal fasciculus.
  • ED symptom severity, assessed by IIEF and QEQ scores, correlated negatively with FA and positively with AD and MD in the splenium of the corpus callosum.

Conclusions:

  • This study provides preliminary evidence of white matter (WM) microstructural changes in psychological ED.
  • Morphological alterations in the splenium of the corpus callosum are associated with the severity of ED symptoms.
  • Neuroimaging, specifically DTI, may offer insights into the pathophysiology of psychological ED.