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Drinking and driving: a decrease in executive frontal functions in young drivers with high blood alcohol

Simone Cristina Aires Domingues1, Josidéia Barreto Mendonça, Ronaldo Laranjeira

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Higher blood alcohol concentration (BAC) impairs frontal executive functions in night drivers. Young adults showed particular vulnerability in motor programming, crucial for driving skills.

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Area of Science:

  • Neuroscience
  • Traffic Safety
  • Cognitive Psychology

Background:

  • Driving under the influence of alcohol poses significant risks.
  • Executive frontal functions are critical for safe driving.
  • Young adults are a high-risk demographic for alcohol-related traffic accidents.

Purpose of the Study:

  • To investigate the correlation between blood alcohol concentration (BAC) and executive frontal functions in night drivers.
  • To identify specific cognitive deficits associated with alcohol consumption in drivers.
  • To examine the impact of alcohol on frontal functions, particularly in young adults.

Main Methods:

  • Random recruitment of 592 night drivers in Vitória, Brazil.
  • BAC determination using a portable digital breath alcohol analyzer for 444 drivers.
  • Assessment of frontal functions using the Frontal Assessment Battery (FAB) for 389 drivers.

Main Results:

  • 24.4% of drivers had detectable BAC levels.
  • An inverse relationship was observed between BAC and FAB scores, indicating reduced frontal function with increased alcohol levels.
  • Young adults exhibited significant impairment in motor programming, a key component of executive function for driving.

Conclusions:

  • Alcohol consumption progressively impairs frontal executive functions in night drivers.
  • Young adult drivers are particularly susceptible to alcohol-induced deficits in motor programming and driving skills.
  • Targeted preventive strategies focusing on young adults are crucial to mitigate alcohol-related driving risks.