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Structural insights into aberrant cortical morphometry and network organization in psychogenic erectile dysfunction.

Lu Zhao1, Min Guan2, Xiangsheng Zhang3

  • 1McConnell Brain Imaging Centre, Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada.

Human Brain Mapping
|August 13, 2015
PubMed
Summary

Psychogenic erectile dysfunction (pED) in men is linked to reduced cortical thickness (CTh) in brain regions crucial for sexual arousal. These structural changes correlate with sexual functioning decline, suggesting a potential organic vulnerability factor.

Keywords:
cortical thicknessmagnetic resonance imagingpsychogenic erectile dysfunctionscale space searchstructural covariance network

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Area of Science:

  • Neuroscience
  • Neuroimaging
  • Psychiatry

Background:

  • Functional neuroimaging indicates altered brain activity during sexual arousal in men with psychogenic erectile dysfunction (pED).
  • The specific brain structure abnormalities underlying pED remain largely undetermined.

Purpose of the Study:

  • To investigate the neuroanatomical differences in cortical thickness (CTh) between men with pED and healthy controls.
  • To explore the relationship between CTh abnormalities and sexual functioning in pED.

Main Methods:

  • Structural magnetic resonance imaging (MRI) was used to measure CTh in 40 men with pED and 39 healthy controls.
  • Scale space search-based brain morphometric analysis identified CTh differences.
  • Brain structural covariance networks were analyzed to assess interregional connectivity.

Main Results:

  • pED patients exhibited significantly reduced CTh in widespread cortical areas, including the medial prefrontal, orbitofrontal, cingulate, inferotemporal, and insular cortices.
  • CTh reductions in these regions were significantly correlated with diminished sexual functioning.
  • Decreased interregional CTh correlations were observed in pED patients, suggesting network disassociations.

Conclusions:

  • This study reveals significant structural brain abnormalities, specifically reduced CTh, associated with pED.
  • These findings suggest that CTh alterations may represent an underlying organic vulnerability factor contributing to psychogenic erectile dysfunction in men.