An Analysis of Inquiry for Motion Sickness Incidence of the Training Ship, Kaya, due to the Ship Motion

Motion sickness incidence index (MSI) is one of essential issues in ship motion research to access the comfort of passenger on board cruises and yachts. In the paper, wave energy spectrum and MSI will be analyzed. Evaluation will not only provide an initial feedback of passenger’s comfort in ship design stage but also estimate the suitable speed to steer the cruise comfortably.

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Predictive ability of motion sickness susceptibility questionnaire for seasickness individual difference in Chinese military personnel

10.21203/rs.3.rs-20259/v1 ◽

2020 ◽

Author(s):

Leilei Pan ◽

Ruirui Qi ◽

Shuifeng Xiao ◽

Yuqi Mao ◽

Yang Su ◽

...

Keyword(s):

Motion Sickness ◽

Military Personnel ◽

Area Under The Curve ◽

Young Male ◽

Predictive Ability ◽

Ship Motion ◽

Lower Percentage ◽

Vertical Oscillation ◽

Prediction Ability ◽

Chinese Military

Abstract Background Motion sickness susceptibility questionnaire (MSSQ) has been widely used for assessing individual differences in motion sickness. The present study tried to investigate its efficacy for predicting seasickness susceptible (SUS) and insusceptible (INSUS) subjects among Chinese military personnel. Methods Two cohorts of young male army volunteers were exposed to real ship motion (n=125) and laboratory vertical oscillation motion (n=77). Predictive ability of the MSSQ and its vomiting (MSV) and nausea (MSN) subscales (including child and adult subitems) was examined via analyzing area under the curve (AUC) of receiver operating characteristic (ROC) with seasickness susceptibility defined by Graybiel score or nausea latency. Results Higher Graybiel scores and lower percentage of INSUS subjects was observed in the ship motion trial than the vertical oscillation trial. MSSQ and its subscales positively correlated with the Graybiel score in both trials. The MSN child showed no predictive ability for the INSUS subjects, leading to lower AUC of the MSN than the MSSQ and the MSV for INSUS prediction in ship motion (0.587 vs. 0.647 and 0.644, P < 0.01) and vertical oscillation trial (0.696 vs. 0.761 and 0.788, P < 0.01 and 0.05) when seasickness susceptibility was defined by Graybiel score. Lower AUC in the MSN than the MSSQ (0.691 vs. 0.758, P < 0.05 and 0.01) was observed due to invalidity of MSN child when susceptibility was defined by nausea latency in the vertical oscillation trial. The prediction ability of SUS did not differ among the MSSQ and its subscales in both trials. Relative to the ship motion trial, the vertical oscillation trial showed higher predictive efficacy of the MSSQ for the Graybiel score-defined SUS subjects (0.840 vs. 0.686, P < 0.05) as a result of higher AUC in both the MSV (0.840 vs. 0.690, P < 0.05) and the MSN (0.806 vs. 0.651, P < 0.01). Conclusions The MSSQ was effective for predicting seasickness susceptibility in young male Chinese military members, but the efficacy varies with motion intensity and complexity and the vomiting scale should be recommended for application.

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Motion Sickness Symptons and Postural Changes following Flights in Motion-Based Flight Trainers

Journal of Low Frequency Noise Vibration and Active Control ◽

10.1177/026309238700600402 ◽

1987 ◽

Vol 6 (4) ◽

pp. 147-154 ◽

Cited By ~ 7

Author(s):

R.S. Kennedy ◽

G.O. Allgood ◽

B.W. Van Hoy ◽

M.G. Lilienthal

Keyword(s):

Learning Curve ◽

Motion Sickness ◽

Ship Motion ◽

Simulator Sickness ◽

Linear Dimensions ◽

Postural Changes ◽

Moving Base ◽

Antisubmarine Warfare ◽

Standard Training ◽

Low Levels

Navy pilots flew over 193 standard training mission scenarios while acceleration recordings in three linear dimensions (gx, gy, and gz) were made for two moving-base flight trainers. The pilots, who were of comparable age and experience in both groups, were interviewed for motion sickness symptomatology and were tested for ataxia after leaving the simulators. The aircraft simulated included a P-3C turboprop fixed-wing patrol aircraft (2F87F), and an SH-3 antisubmarine warfare helicopter (2F64C). Motion sickness incidence was high in the SH-3 simulator and nonexistent in the P-3C. Ataxia scores indicated departures, though not significant, from expected learning curve improvements after exposure in both simulators. Spectral analyses of the motion recordings revealed significant amounts of energy in the nauseogenic region of 0.2 Hz in the SH-3 simulator in the gz and gy, but not in the gx. The levels exceeded those recommended for ship motion exposures by Military Standard 1472C. The P-3C simulator had low levels of energy in these regions, and well below recommended levels. The data are discussed from the standpoint that simulator sickness in moving-base simulation may be, at least in part, a function of exposure to frequencies that make people seasick.

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An Experiment on Controlling Motion Sickness Severity in a Ship Motion Simulator

10.3940/rina.hf.2007.02 ◽

2007 ◽

Author(s):

J L Colwell ◽

◽

S N MacKinnon ◽

Keyword(s):

Motion Sickness ◽

Ship Motion ◽

Motion Simulator

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Vestibular Function and Motion Sickness Susceptibility: Videonystagmographic Evidence From Oculomotor and Caloric Tests

American Journal of Audiology ◽

10.1044/2020_aja-19-00050 ◽

2020 ◽

Vol 29 (2) ◽

pp. 188-198

Author(s):

Cynthia G. Fowler ◽

Margaret Dallapiazza ◽

Kathleen Talbot Hadsell

Keyword(s):

Phase Velocity ◽

Motion Sickness ◽

Repeated Measures ◽

Short Form ◽

Vestibular Function ◽

Slow Phase ◽

Test Results ◽

Normal Range ◽

Slow Phase Velocity ◽

Caloric Tests

Purpose Motion sickness (MS) is a common condition that affects millions of individuals. Although the condition is common and can be debilitating, little research has focused on the vestibular function associated with susceptibility to MS. One causal theory of MS is an asymmetry of vestibular function within or between ears. The purposes of this study, therefore, were (a) to determine if the vestibular system (oculomotor and caloric tests) in videonystagmography (VNG) is associated with susceptibility to MS and (b) to determine if these tests support the theory of an asymmetry between ears associated with MS susceptibility. Method VNG was used to measure oculomotor and caloric responses. Fifty young adults were recruited; 50 completed the oculomotor tests, and 31 completed the four caloric irrigations. MS susceptibility was evaluated with the Motion Sickness Susceptibility Questionnaire–Short Form; in this study, percent susceptibility ranged from 0% to 100% in the participants. Participants were divided into three susceptibility groups (Low, Mid, and High). Repeated-measures analyses of variance and pairwise comparisons determined significance among the groups on the VNG test results. Results Oculomotor test results revealed no significant differences among the MS susceptibility groups. Caloric stimuli elicited responses that were correlated positively with susceptibility to MS. Slow-phase velocity was slowest in the Low MS group compared to the Mid and High groups. There was no significant asymmetry between ears in any of the groups. Conclusions MS susceptibility was significantly and positively correlated with caloric slow-phase velocity. Although asymmetries between ears are purported to be associated with MS, asymmetries were not evident. Susceptibility to MS may contribute to interindividual variability of caloric responses within the normal range.

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