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 and increases fall risk by affecting vestibular function.
• Acute alcohol intake serves as a transient model for studying vestibular dysfunction.

Purpose of the Study:

• To assess if galvanic vestibular stimulation (GVS) can counteract alcohol-induced postural instability.
• To validate acute alcohol intake as a model for vestibular dysfunction research.

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 GVS (fGVS).
• Static balance was measured on a stabilometric platform with eyes closed on an unstable surface.

Main Results:

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

Conclusions:

• Random noise GVS effectively mitigates alcohol-induced postural instability in a controlled experimental setting.
• Acute alcohol intake is a viable model for investigating vestibular modulation strategies.