A lateral rotation apparatus includes a first adjustable frame positioned under a head segment of a person support surface and operable to rotate the head segment of the person support surface to a head tilt angle in the range of about 7 to about 30 degrees relative to a horizontal support plane. A second adjustable frame is positioned under a torso segment of a person support surface and operable to rotate the torso segment of the person support surface to a torso tilt angle that is within a range of about 5 degrees to about 10 degrees less than the head tilt angle. Each of the first adjustable frame and the second adjustable frame includes an upper frame positioned below the person support surface, and a lower frame coupled to and positioned below the upper frame. The upper frame being moveable with respect to the lower frame.