Evaluation of a Device to Reduce Motion Sickness and Spatial Disorientation

The Sparrow Ascent device will be programmed to the preset stimulation parameters. Two individual stimulation frequencies will be set: 15 Hz at cymba concha (Region 1/Channel 1; vagal innervation) and 100 Hz adjacently anterior to the tragus (Region 2/Channel 2; trigeminal innervation). The pulse duration will be set to 250 #s for all participants. The stimulation intensities (mA) will be set to 1.0 and 1.4 (for Region 1 and 2, respectively) based on the median values observed in the previous data set. If the participant states that the stimulation intensity is discomforting, the research coordinator will gradually decrease/increase until a comfortable stimulation intensity is achieved