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Alcohol and postural imbalance. A force plate study

H H Thyssen, J Brynskov, E C Jansen

    Zeitschrift Fur Rechtsmedizin. Journal of Legal Medicine
    |January 1, 1981
    PubMed
    Summary
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    This study found that alcohol consumption significantly impairs balance. Postural instability increased notably in individuals with blood alcohol concentrations exceeding 0.6 mg/ml, highlighting risks associated with alcohol intake.

    Area of Science:

    • Neuroscience
    • Human Physiology
    • Toxicology

    Background:

    • Maintaining a stable upright stance is crucial for daily activities.
    • Alcohol consumption is known to affect cognitive and motor functions.
    • Objective quantification of alcohol's impact on balance is essential for safety assessments.

    Purpose of the Study:

    • To objectively measure the effects of controlled alcohol intake on postural balance.
    • To determine the blood alcohol concentration (BAC) threshold at which significant postural imbalance occurs.

    Main Methods:

    • Sixteen healthy adults received 20g of alcohol hourly for 4-5 hours.
    • Blood alcohol concentrations were monitored throughout the experiment.
    • Postural sway was measured hourly using a computer-assisted force plate system.

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    Main Results:

    • Blood alcohol concentrations ranged from 0.1 to 1.7 mg/ml (0.1-1.7%).
    • Significant increases in postural imbalance were observed at BACs above 0.6 mg/ml (0.6%).
    • A dose-dependent relationship between alcohol consumption and postural instability was evident.

    Conclusions:

    • Alcohol consumption demonstrably impairs postural control in a dose-dependent manner.
    • A BAC of 0.6 mg/ml serves as a critical threshold for noticeable balance impairment.
    • These findings underscore the risks of alcohol for individuals reliant on stable balance.