XInitiation of rapid tilt upYConclusion of rapid tilt up}XInitiation of rapid tilt downgYConclusion of rapid tilt downEeXStand-upXTransition back to supine*'XInitiation of slow tilt up0XConclusion of slow tilt upXInitiation of slow tilt down0XConslusion of slow tilt downzXStand-up| XTransition back to supineXInitiation of rapid tilt upcYConclusion of rapid tilt upXInitiation of rapid tilt downYConclusion of rapid tilt downoXInitiation of slow tilt up0XConclusion of slow tilt upWX Initiation of slow tilt down0X Conclusion of slow tilt down