LaCount, LaurenNapadow, VitalyKuo, BradenPark, K.Kim, J.Brown, EmeryBarbieri, Riccardo2022-08-102009LaCount, Lauren, Vitaly Napadow, Braden Kuo, K. Park, J. Kim, Emery Brown, Riccardo Barbieri. "Dynamic Cardiovagal Response to Motion Sickness: A Point-Process Heart Rate Variability Study." Computers in Cardiology 36 (2009): 49-52.0276-6574https://nrs.harvard.edu/URN-3:HUL.INSTREPOS:37372983A visual display of stripes was used to examine cardio-vagal response to motion sickness. Heart rate variability (HRV) was investigated using dynamic methods to discern instantaneous fluctuations in reaction to stimulus and perception-based events. A novel point process adaptive recursive algorithm was applied to the R-R series to compute instantaneous heart rate, HRV, and high frequency (HF) power as a marker of vagal activity. Results show interesting dynamic trends in each of the considered subjects. HF power averaged across ten subjects indicates a significant decrease 20s to 60s following the transition from “no nausea” to “mild.” Conversely, right before “strong” nausea, the group average shows a transient trending increase in HF power. Findings confirm gradual sympathetic activation with increasing nausea, and further evidence transitory increases in vagal tone before flushes of strong nausea.en-USResearch Subject Categories::MEDICINE::Dermatology and venerology,clinical genetics, internal medicine::Internal medicine::CardiologyResearch Subject Categories::MEDICINE::Physiology and pharmacology::Physiology::Medical informaticsConference Paper2017-07-2320092022-08-10