Effect of exposure to short-wavelength light on susceptibility to motion sickness. Issue 10 (5th July 2017)

• Record Type: Journal Article
• Authors: Kim, Kyungshil; Hirayama, Kazumi; Yoshida, Kazuki; Yano, Rika; Abe, Masayuki; Otsuki, Mika; Sakuraba, Satoshi; Sakai, Shinya
• Is Part Of: NeuroReport. Volume 28:Issue 10(2017)
• Publication Date: 2017-07-05
• Subjects: autonomic nervous system -- electrogastrography -- motion sickness -- nausea -- short-wavelength light; Neurosciences -- Periodicals; Nervous system -- Periodicals; Neurophysiology -- Periodicals; Nervous System Diseases -- Periodicals; Nervous System Physiological Phenomena -- Periodicals; Neurosciences -- Periodicals; 616.805
• DOI: 10.1097/WNR.0000000000000802
• Languages: English
• ISSNs: 0959-4965

Abstract

Abstract : This randomized cross-over study tested the hypothesis that exposure to short-wavelength light induces symptoms of motion sickness (MS). The study participants were 28 healthy adults (14 women; mean age±SD, 25.96±3.11 years). Two stimuli oscillating within a range of 0.4–0.6 Hz were used to induce MS: a blue wave stimulus with short-wavelength light (460 nm) and a green wave stimulus with middle-wavelength light (555 nm). All participants were exposed to both stimuli throughout two separate periods. After a baseline period, participants were exposed to each stimulus three times for 4 min. The Simulator Sickness Questionnaire, a self-report checklist composed of three subscales (Oculomotor, Disorientation, and Nausea), heart rate variability, and electrogastrography were used to measure the degree of symptoms related to MS. A linear mixed-effects model was used for statistical analysis. The results showed significant main effects for Period ( P <0.01), Color ( P <0.01), and Time Point ( P <0.01) scores on the Simulator Sickness Questionnaire Nausea subscale. A post-hoc test indicated that scores on the Nausea subscale were significantly higher after the third exposure to blue light than after the first and second exposures. The linear mixed-effects model showed significant main effects for Color ( P <0.01) with respect to the normogastria/tachygastria ratio. These findings suggest that short-wavelength light induces symptoms of MS, especially gastrointestinal symptoms.