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June 20, 2008Human Brain MappingOpen Access

Alcohol dose effects on brain circuits during simulated driving: An fMRI study

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Key result

Alcohol intoxication caused significant dose-dependent impairments in driving behavior, such as opposite white line crossings (p=0.009), and disrupted functionality in driving-associated brain regions.

Why the study?

Does alcohol intoxication impair brain circuits and behavior during simulated driving in healthy adults?

Population

40 healthy, right-handed men and women, mean age 24.75 ± 4.7 years, moderate social drinkers with valid…

Comparison

Individualized single-blind doses of beverage… vs Placebo beverage (0% BAC).

Design

RCT, randomized, single-blind

Follow-up

acute (during simulated driving scan)

Authors

SMShashwath A. MedaVCVince D. CalhounRARobert S. Astur

Discussion

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Overview

Abstinence from alcohol remains essential before driving; confirms causal effects on behavior and circuits, extending RCT evidence to simulated tasks.

Study Design

Type

RCT (n=40)

Blinding

Single-blind

Randomization

Randomized

Multicenter

No

Structured PICO

Does alcohol intoxication impair brain circuits and behavior during simulated driving in healthy adults?

P
Population
40 healthy young adult moderate social drinkers underwent fMRI scanning during simulated driving under three randomized, single-blind doses of alcohol (placebo, moderate, high).
I
Intervention
Individualized single-blind doses of beverage alcohol to produce blood alcohol concentrations (BACs) of 0.05% (moderate) and 0.10% (high).
C
Comparator
Placebo beverage (0% BAC).
O
Outcome
Brain function assessed using independent component analysis (ICA) and general linear model (GLM) analysis during simulated driving, and continuous behavioral measures (line crossings, speed, crashes).surrogate

Main Result

p-value: p=0.009

Alcohol intoxication produces dose-dependent impairments in simulated driving performance and functional disruptions in brain circuits related to motor planning, error monitoring, and memory.

Limitations

  • Blocked paradigm design prevents analyzing data on a finer temporal scale
  • Naturalistic driving paradigm allowed for a low number of infrequent errors like crashes
  • Vasoactive properties of alcohol may potentially confound BOLD fMRI signals

Cite This Study

Meda et al. (2008) conducted an RCT in Healthy adults (n=40). Alcohol vs. Placebo (BAC 0%) was evaluated on Dose-related changes in driving behavior (opposite white line crossings) and brain circuit functional synchrony (p=0.009). Alcohol intoxication caused significant dose-dependent impairments in driving behavior, such as opposite white line crossings (p=0.009), and disrupted functionality in driving-associated brain regions.

synapsesocial.com/papers/6a870ad2cbde9db34bcb93edhttps://doi.org/10.1002/hbm.20591
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Also Consider

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