Comparison of Electrogastrograms in a Seated Posture with those in a Supine Posture Using Wayland Algorithm

Abstract

There are few reports to compare gastrointestinal motility in a seated posture and that in a supine posture for the evaluation of the severity of the motion sickness. It is difficult to distinguish between postural differences by using nonlinear analysis of the electrogastrograms (EGGs) of healthy individuals. The purpose of this study was to determine the feasibility of applying a complex dynamic analysis method to the EGGs of healthy young individuals between in a seated posture and those in a supine posture. We analyzed EGGs by using the Wayland algorithm for the evaluation motion sickness induced by stereoscopic movies. The results suggest that EGGs in a seated posture are more irregular in wavelength and complex in the attractor compared to those in a supine posture.