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Galvanic Vestibular Stimulation influences risk-taking behaviour.

Gabriele De Maio¹, Gabriella Bottini², Elisa Raffaella Ferré³

¹Department of Psychology, Royal Holloway University of London, Egham, UK; Brain and Behavioural Sciences Department, University of Pavia, Pavia, Italy.

Neuropsychologia

|July 25, 2021

Summary

Vestibular stimulation influences risk-taking behavior. Specific galvanic vestibular stimulation (GVS) polarity altered decisions on the Balloon Analogue Risk Task (BART), indicating a role for the vestibular system in risk assessment.

Keywords:

Balloon analogue risk task Behavioural control Galvanic vestibular stimulation Risk-taking behaviour Vestibular system

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Area of Science:

Neuroscience
Decision-making research
Vestibular system function

Background:

Risk-taking behavior is crucial for environmental interaction and survival.
The vestibular system's role in decision-making and behavioral control is increasingly recognized.
Understanding how sensory inputs modulate risk propensity is key to explaining adaptive behaviors.

Purpose of the Study:

To investigate the influence of vestibular inputs on risk-taking propensity.
To determine if galvanic vestibular stimulation (GVS) affects behavioral measures of risk-taking.
To explore the polarity-dependent effects of GVS on decision-making strategies.

Main Methods:

Utilized bipolar galvanic vestibular stimulation (GVS) with varying polarities.
Employed the Balloon Analogue Risk Task (BART) to measure risk-taking behavior.
Included a sham stimulation condition to control for non-specific effects.

Main Results:

Left-anodal GVS (activating right hemisphere vestibular projections) significantly decreased risk-taking on the BART.
Right-anodal GVS (activating left hemisphere vestibular projections) did not show the same effect.
The observed effects were dependent on GVS polarity, confirming a specific vestibular influence.

Conclusions:

Vestibular stimulation, specifically GVS polarity, directly influences risk-taking behavior.
Findings support the vestibular system's contribution to decision-making and strategy control.
Vestibular-mediated balancing of risk-seeking behavior is vital for environmental adaptation.