Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Effect of predictive sign of acceleration on heart rate variability in passive translation situation: preliminary evidence using visual and vestibular stimuli in VR environment | Journal of NeuroEngineering and Rehabilitation BioMed Central Research Open Access Effect of predictive sign of acceleration on heart rate variability in passive translation situation preliminary evidence using visual and vestibular stimuli in VR environment Hiroshi Watanabe Wataru Teramoto and Hiroyuki Umemura Address Institute for Human Science and Biomedical Engineering National Institute of Advanced Industrial Science and Technology Ikeda Osaka Japan Email Hiroshi Watanabe - Wataru Teramoto - Hiroyuki Umemura - Corresponding author Published 29 September 2007 Received II April 2006 _k _. n. A I tn Accepted 29 September 2007 Journal of NeuroEngineering and Rehabilitation 2007 4 36 doi 1743-0003-4-36 This article is available from http content 4 1 36 2007 Watanabe et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Objective We studied the effects of the presentation of a visual sign that warned subjects of acceleration around the yaw and pitch axes in virtual reality VR on their heart rate variability. Methods Synchronization of the immersive virtual reality equipment CAVE and motion base system generated a driving scene and provided subjects with dynamic and wide-ranging depth information and vestibular input. The heart rate variability of 21 subjects was measured while the subjects observed a simulated driving scene for 16 minutes under three different conditions. Results When the predictive sign of the acceleration appeared 3500 ms before the acceleration the index of the activity of the autonomic nervous system low high frequency ratio LF HF ratio of subjects did not change much whereas when no sign appeared
