Moïn-Darbari Karina, Paromov Daniel, Bacon Benoit-Antoine, Maheu Maxime, Champoux François
École d'orthophonie et d'audiologie, Université de Montréal, Montreal, H3N1X7, QC, Canada.
Centre de recherche de l'Institut universitaire de gériatrie de Montréal (CRIUGM), Montreal, QC, Canada.
Sci Rep. 2025 Jul 25;15(1):27152. doi: 10.1038/s41598-025-12683-3.
Motion sickness is defined as a sensation of uneasiness that occurs during physical motion, such as transportation by bus, plane, car or train. Postural control is one of the multisensory processes that has been examined in individuals susceptible to motion sickness. Indeed, postural control relies on visual, somatosensory and vestibular information. While studies suggest normal-like postural control during quiet standing, others suggest that individuals with motion sickness show increased postural instability during sensory perturbations, namely during visual and somatosensory disturbances. The impact of vestibular stimulation on postural control in individuals with motion sickness has yet to be determined. Therefore, the aim of the present exploratory study was to examine the effects of sinusoidal electrical vestibular stimulation on postural control in individuals with varying degrees of motion sickness. Fifty participants were divided into three groups based their susceptibility to motion sickness. Participants were initially tested at baseline in the four postural conditions of the modified Clinical Test of Sensory Integration and Balance protocol (mCTSIB): eyes open on firm surface, eyes closed on firm surface, eyes open on foam surface, eyes closed on foam surface. These four conditions were then repeated during sinusoidal electrical vestibular stimulation (EVS) of 1 mA at 1 Hz. In baseline conditions, no significant group differences in postural control were found. Data in experimental (EVS) conditions, however, suggests that individuals with high susceptibility to motion sickness are more impacted by vestibular stimulation, specifically in the eyes closed on firm surface condition. It has been suggested that motion sickness could be the result of an altered multisensory integration process. While the present data do not allow us to answer this question, it would remain important to examine all types of sensory perturbations and combinations thereof in a larger group of individuals.
晕动病被定义为在身体运动过程中出现的一种不适感，比如乘坐公交、飞机、汽车或火车时。姿势控制是在易患晕动病的个体中被研究过的多感官过程之一。事实上，姿势控制依赖于视觉、躯体感觉和前庭信息。虽然研究表明在安静站立时姿势控制正常，但也有研究表明，晕动病患者在感觉受到干扰时，即在视觉和躯体感觉受到干扰时，姿势不稳定会增加。前庭刺激对晕动病患者姿势控制的影响尚未确定。因此，本探索性研究的目的是研究正弦电前庭刺激对不同程度晕动病患者姿势控制的影响。50名参与者根据他们对晕动病的易感性被分为三组。参与者最初在改良的感觉统合与平衡临床测试方案（mCTSIB）的四种姿势条件下进行基线测试：在坚实表面睁眼、在坚实表面闭眼、在泡沫表面睁眼、在泡沫表面闭眼。然后在1Hz频率、1mA的正弦电前庭刺激（EVS）过程中重复这四种条件。在基线条件下，未发现姿势控制方面有显著的组间差异。然而，实验（EVS）条件下的数据表明，对晕动病高度易感的个体受前庭刺激的影响更大，特别是在坚实表面闭眼的条件下。有人认为晕动病可能是多感官整合过程改变的结果。虽然目前的数据无法让我们回答这个问题，但在更大规模的个体群体中研究所有类型的感觉干扰及其组合仍然很重要。
