Effect of Standardized Yelling on Subjective Perception and Autonomic Nervous System Activity in Motion Sickness

Min-Yu Tu, Hsin Chu, Chung-Yu Lai, Kwo-Tsao Chiang, Chi-Chan Huang, Hsien-Chuan Chin, Yu-Hsin Wen and Chien-Liang Chen
Additional contact information
Min-Yu Tu: Aviation Physiology Research Laboratory, Kaohsiung Armed Forces General Hospital Gangshan Branch, Kaohsiung 820, Taiwan
Hsin Chu: Medical Section, Civil Aviation Medical Center, Taipei City 105, Taiwan
Chung-Yu Lai: Graduate Institute of Aerospace and Undersea Medicine, National Defense Medical Center, Taipei City 114, Taiwan
Kwo-Tsao Chiang: Aviation Physiology Research Laboratory, Kaohsiung Armed Forces General Hospital Gangshan Branch, Kaohsiung 820, Taiwan
Chi-Chan Huang: Aviation Physiology Research Laboratory, Kaohsiung Armed Forces General Hospital Gangshan Branch, Kaohsiung 820, Taiwan
Hsien-Chuan Chin: Aviation Physiology Research Laboratory, Kaohsiung Armed Forces General Hospital Gangshan Branch, Kaohsiung 820, Taiwan
Yu-Hsin Wen: Aviation Physiology Research Laboratory, Kaohsiung Armed Forces General Hospital Gangshan Branch, Kaohsiung 820, Taiwan
Chien-Liang Chen: Department of Physical Therapy, I-Shou University, Yan-chao District, Kaohsiung 824, Taiwan

IJERPH, 2021, vol. 18, issue 23, 1-15

Abstract: This study investigated the effects of yelling intervention on symptoms and autonomic responses in motion sickness. Forty-two healthy participants were recruited, and they participated in Coriolis stimulation, a technique for inducing motion sickness. The experimental procedure comprised five 1-min rotating stimuli with 1-min rest after each stimulus. Then, the symptom severity was assessed using the Motion Sickness Symptom Rating (MSSR). The d2 Test of Attention scores and cardiovascular responses were recorded before and after Coriolis stimulation. The electrocardiogram results were documented to analyze heart rate variability (HRV). During Coriolis stimulus, the participants were required to yell 5–8 times in the experimental trial, and to keep quiet for each minute of rotation in the control trial. The yelling intervention significantly reduced the MSSR score ( p < 0.001). Nevertheless, it did not significantly affect the d2 Test of Attention scores. Yelling while rotating did not significantly affect the heart rate nor blood pressure. However, it decreased the normalized low frequency of HRV ( p = 0.036). Moreover, it improved motion sickness, but its effect on attention was not evident. Motion sickness could significantly affect cardiovascular responses and HRV. However, yelling did not affect cardiovascular response, and it reduced sympathetic nervous system activity.

Keywords: yelling with abdominal force; vocalization; heart rate variability; cognitive responses; Coriolis stimulation (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2021
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