Gastric Arrhythmia and Nausea of Motion Sickness Induced in Healthy Japanese Subjects Viewing an Optokinetic Rotating Drum

Abstract

Abstract:The purpose of this study was to investigate whether nausea or gastric dysrhythmia, including tachygastria, which was determined by electrogastrography (EGG), were observed during optokinetic motion sickness in healthy Japanese volunteers. Twelve volunteers (9 men and 3 women) participated in the study. The subjects were asked to sit in a chair with their heads positioned in the center of a drum whose inside had been painted with black and white stripes. After a 15 min resting period, the drum was rotated at a speed of 60 degree/sec for 15 min. The EGG was continuously recorded for a total of 45 min (15 min resting period, 15 min rotation period, and 15 min recovery period). The severity of nausea was evaluated with a visual analogue scale (VAS) before, immediately after, and 15 min after the cessation of drum rotation. Other motion sickness symptoms were evaluated by scores of subjective symptoms of motion sickness (SSMS). Of 12 subjects who completed the study, 10 complained of nausea immediately after cessation of drum rotation. The VAS score for nausea immediately after the drum rotation period and 15 min after cessation of the rotation was significantly higher than during the resting period. The EGG during the drum rotation period showed a decrease in normogastria, which was accompanied with an increase in tachygastria. We conclude that gastric tachyarrhythmia and nausea may be induced by viewing an optokinetic rotating drum in healthy Japanese subjects who may have a hypersusceptibility to vection-induced motion sickness. The gastric dysrhythmia obtained with EGG could be a useful observation to support the appearance of nausea induced by optokinetic motion sickness.

Ameliorating effects and autonomic mechanisms of needle‐less transcutaneous electrical stimulation atST36 on stress‐induced impairment in gastric slow waves

“…Imai K et al . founded an increase in tachygastria accompanied with a decrease in the percentage of normal slow waves induced by optokinetic motion sickness . Chen et al .…”

“…Imai K et al founded an increase in tachygastria accompanied with a decrease in the percentage of normal slow waves induced by optokinetic motion sickness. 28 Chen et al reported that audio stimulation (noise) decreased percentage of normal gastric slow wave in adolescents in fasting state. 29 In addition, there was a significant increase in the instability coefficient of dominant frequency with the cold stress.…”

Central and Peripheral Effects of Transcutaneous Acupuncture Treatment for Nausea in Patients with Diabetic Gastroparesis

“…The visual stimuli decreased the percentage of normal slow waves in the fasting state, attributed to an increase in bradygastria and tachygastria. The effect of stress on gastric slow waves was shown by Imai et al 32 who demonstrated an increase in tachygastria with a decrease in the normal slow waves induced by optokinetic motion sickness. Also, Chen et al 33 showed that audio stimulation (noise) impaired percentage of normal gastric slow wave in adolescents.…”

Cleaning the palate and tongue without nausea: a mixed methods study exploring the appropriate depth and direction of oral care

“…All participants' palates were cleaned first, followed by their tongues. After cleaning, the participants rated the extent of nausea they felt using a visual analogue scale (VAS) [15], which ranged from 0 (not at all) to 10 (very strong). To rule out the effect of cleaning time on nausea, we measured it using a stopwatch from mouth opening to mouth closing.…”