Exploring the Feasibility of Mitigating Alcohol-Induced Instability Using Galvanic Vestibular Stimulation

Area of Science:

• Neuroscience
• Vestibular System Research
• Human Physiology

Background:

• Alcohol consumption impairs balance by affecting vestibular function, increasing fall risk.
• Acute alcohol intake can serve as a controlled model for transient vestibular dysfunction.

Purpose of the Study:

• To assess if galvanic vestibular stimulation (GVS) can counteract alcohol-induced postural instability.
• To investigate the effects of different GVS types on balance in alcohol consumers.

Main Methods:

• Sixty healthy adults were divided into alcohol-consuming (BAC 0.06-0.08%) and non-consuming groups.
• Participants received random noise GVS (rnGVS), direct current plus random noise GVS (rn-dcGVS), or sham stimulation (fGVS).
• Static balance was measured using a stabilometric platform with eyes closed on an unstable surface.

Main Results:

• Alcohol consumption significantly worsened balance, mimicking vestibular hypofunction.
• rnGVS improved postural stability in alcohol consumers, reducing sway and displacement.
• rn-dcGVS worsened balance in non-consumers, with no significant effect in alcohol consumers.

Conclusions:

• Random noise GVS effectively attenuates alcohol-induced postural instability in an experimental model.
• Acute alcohol intake is a viable model for studying vestibular modulation and GVS interventions.