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Current smoking and reduced gray matter volume-a voxel-based morphometry study.

Hans-Christian Fritz1, Katrin Wittfeld2, Carsten O Schmidt3

  • 1Functional Imaging Unit, Institute for Diagnostic Radiology and Neuroradiology, University Medicine of Greifswald, Greifswald, Germany.

Neuropsychopharmacology : Official Publication of the American College of Neuropsychopharmacology
|May 17, 2014
PubMed
Summary
This summary is machine-generated.

Smoking is linked to gray matter volume loss in key brain areas like the prefrontal cortex and insula. This study investigated brain structure differences between smokers and never-smokers using MRI scans.

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Area of Science:

  • Neuroscience
  • Radiology
  • Addiction Research

Background:

  • Nicotine affects prefrontal processing, but brain volume changes in smokers remain controversial.
  • Previous studies with small samples reported varied results on regional brain volumes related to nicotine exposure.

Purpose of the Study:

  • To investigate the association between cigarette smoking and regional gray and white matter brain volumes.
  • To identify specific brain regions affected by smoking using voxel-based morphometry (VBM).

Main Methods:

  • Utilized T1-weighted high-resolution magnetic resonance imaging (MRI).
  • Employed voxel-based morphometry (VBM) analysis.
  • Studied 315 current smokers and 659 never-smokers from the Study of Health in Pomerania (SHIP).

Main Results:

  • Current smokers showed significant gray matter volume loss in the prefrontal cortex, anterior cingulate cortex, insula, and olfactory gyrus.
  • White matter volumes were not significantly reduced in current smokers.
  • Associations between gray matter loss and smoking exposure (pack-years) were observed in several regions but did not survive multiple testing corrections.

Conclusions:

  • Smoking is associated with gray matter volume reduction in specific brain areas, including the prefrontal cortex, anterior cingulate cortex, and insula.
  • This study identified olfactory gyrus volume differences in smokers for the first time.
  • Observed structural deficits may relate to addictive behaviors and withdrawal, but causality requires further investigation.