Electrocortical activity across postural conditions during real-world sea navigation in mariners with motion sickness susceptibility

Engineering notes

Key topics: autonomous driving. See the paper for implementation details and experimental results.

Chinese explanation / 中文解读

中文解读待补充：本站会优先为端到端自动驾驶、BEV感知、3D目标检测、轨迹预测、路径规划、LiDAR感知等高价值论文补充中文说明。

Original abstract

Abstract Work and sports activities can be affected by motion sickness in unstable environments, such as at sea, with potential consequences for performance. Central manifestations of motion sickness have been reported in simulator studies, including changes in cortical oscillations (e.g., alpha suppression), heart rate, galvanic skin response, and skin temperature. To date, most EEG studies have used laboratory paradigms to induce motion sickness, whereas the present study adopts a field-based approach during real-world sea navigation. This exploratory observational field study aimed to identify quantitative electroencephalographic (EEG) differences across postural and task conditions in mariners with a history of motion sickness during real-world sea navigation and to describe how these electrocortical patterns were associated with mild motion-related discomfort, without making causal inferences. EEG signals were recorded from nine professional Navy personnel (eight males, one female; age 20 ± 2 years, weight 72 ± 7 kg, height 176 ± 6 cm), while they maintained orthostatic (upright standing) and clinostatic (lying supine) postures with eyes open or closed, and during seated fine-dexterity tasks. Participants reported only mild motion-related discomfort during the voyage, based on brief ad hoc self-reports rather than standardized motion sickness scales. In a subset of trials, orthostatic EEG recordings were acquired simultaneously with stabilometric data on a force platform at the stern of the ship. EEG data were analyzed using ICA-based preprocessing and spectral power estimation; differences among the eight conditions were assessed with repeated-measures ANOVA on independent components, with FDR correction. Statistically significant differences in spectral power were observed across postural and task conditions, with clinostatic posture with eyes closed showing the lowest overall EEG amplitude across frequency bands, and fine-dexterity tasks showing the highest power. No statistically significant correlations were found between stabilometric sway metrics and electrocortical measures, indicating that in this field setting, the relationship between postural sway and cortical dynamics was limited. In motion-sickness-susceptible mariners, posture and eye condition were associated with distinct EEG spectral profiles during real-world sea navigation. The clearest electrocortical differences emerged in clinostatic posture with eyes closed and during fine-dexterity tasks. These findings support the feasibility of field EEG studies in maritime settings, but they remain preliminary because of the small sample size, mild symptom burden, and observational design.

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