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2014 ; 38
(12
): 2925-33
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Widespread effects of alcohol on white matter microstructure
#MMPMID25406797
Fortier CB
; Leritz EC
; Salat DH
; Lindemer E
; Maksimovskiy AL
; Shepel J
; Williams V
; Venne JR
; Milberg WP
; McGlinchey RE
Alcohol Clin Exp Res
2014[Dec]; 38
(12
): 2925-33
PMID25406797
show ga
BACKGROUND: Evidence suggests that chronic misuse of alcohol may preferentially
affect the integrity of frontal white matter (WM) tracts, which can impact
executive functions important to achieve and maintain abstinence. METHODS: Global
and regional WM microstructure was assessed using diffusion magnetic resonance
measures of fractional anisotropy (FA) for 31 abstinent alcoholics (ALC) with an
average of 25 years of abuse and approximately 5 years of sobriety and 20
nonalcoholic control (NC) participants. Data processing was conducted with
FreeSurfer and FSL processing streams. Voxelwise processing of the FA data was
carried out using tract-based spatial statistics. Clusters of significance were
created to provide a quantitative summary of highly significant regions within
the voxelwise analysis. RESULTS: Widespread, bilateral reductions in FA were
observed in ALC as compared to NC participants in multiple frontal, temporal,
parietal, and cerebellar WM tracts. FA in the left inferior frontal gyrus was
associated with drinking severity. CONCLUSIONS: This study found widespread
reductions in WM integrity in a group of ALC compared to NC participants, with
most pronounced effects in frontal and superior tracts. Decreased FA throughout
the frontostriatal circuits that mediate inhibitory control may result in
impulsive behavior and inability to maintain sobriety.