FIG. 1.

Illustration of the centrifugation paradigm and associated vestibular inputs. The head is located a distance “r” from the rotational axis with the right ear outward. The chair rotates in yaw at an angular velocity “w” in the facing-motion direction (counter-clockwise when viewed from above) generating a centrifugal force of rw ², which sums with the earth-vertical gravitational force (“G”) to yield a net gravito-inertial force (GIF) that is tilted by an angle theta relative to the head’s upright orientation.