Assessing head acceleration to identify a motor threshold to galvanic vestibular stimulation

Galvanic vestibular stimulation (GVS) is used to assess the vestibular system, but the high interindividual variability in responses makes comparison between individuals or between different conditions difficult. By using an accelerometer to quantify SVG-induced head movement, we were able to determine an objective motor threshold and construct a recruitment curve for all participants. These methods could help to objectively assess changes in the vestibular system under different conditions.