TY - GEN
T1 - A method for evaluating effects of visually-induced motion sickness using ICA for photoplethysmography
AU - Abe, Makoto
AU - Yoshizawa, Makoto
AU - Sugita, Norihiro
AU - Tanaka, Akira
AU - Chiba, Shigeru
AU - Yambe, Tomoyuki
AU - Nitta, Shin Ichi
PY - 2008/12/1
Y1 - 2008/12/1
N2 - A human watching a swaying image displayed on a wide-field display or screen sometimes suffers from visually-induced motion sickness (VIMS) that causes symptoms related to the autonomic nervous system such as nausea, vomiting, and dizziness. Previous studies indicated that the maximum cross-correlation coefficient (pmax) between blood pressure and heart rate, whose frequency components were limited to the neighborhood of 0.1Hz, was a useful index to evaluate the effects of VIMS on humans. The present study proposed a new method for obtaining pmax with measurement of neither continuous blood pressure nor ECG but using only finger photoplethysmography (PPG). In this study, heart rate was obtained from the foot-to-foot-interval of the PPG signal, and blood pressure-related and event-related pieces of information were obtained from the parameter extracted from using the independent component analysis. The adequacy of the proposed method was evaluated by two experiments with the Valsalva maneuver and with presentation of a swaying video image. The experimental results have shown that the proposed method could extract the independent component related to blood pressure and an event signal of Valsalva maneuver. In addition, the effects of VIMS could be estimated with the independent component.
AB - A human watching a swaying image displayed on a wide-field display or screen sometimes suffers from visually-induced motion sickness (VIMS) that causes symptoms related to the autonomic nervous system such as nausea, vomiting, and dizziness. Previous studies indicated that the maximum cross-correlation coefficient (pmax) between blood pressure and heart rate, whose frequency components were limited to the neighborhood of 0.1Hz, was a useful index to evaluate the effects of VIMS on humans. The present study proposed a new method for obtaining pmax with measurement of neither continuous blood pressure nor ECG but using only finger photoplethysmography (PPG). In this study, heart rate was obtained from the foot-to-foot-interval of the PPG signal, and blood pressure-related and event-related pieces of information were obtained from the parameter extracted from using the independent component analysis. The adequacy of the proposed method was evaluated by two experiments with the Valsalva maneuver and with presentation of a swaying video image. The experimental results have shown that the proposed method could extract the independent component related to blood pressure and an event signal of Valsalva maneuver. In addition, the effects of VIMS could be estimated with the independent component.
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M3 - Conference contribution
C2 - 19163738
AN - SCOPUS:61849117958
SN - 9781424418152
T3 - Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08 - "Personalized Healthcare through Technology"
SP - 4591
EP - 4594
BT - Proceedings of the 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08
T2 - 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'08
Y2 - 20 August 2008 through 25 August 2008
ER -