axis of real rotation (i.e., with the head pitched fully up or down). With the head close to the neutral position, such that Reid’s plane was tilted 18.8° above horizontal (i.e., slight nose-up tilt), the effect of GVS upon rotation sensation was zero. This suggests that GVS evokes a sensation of head roll around a naso-occipital axis. Using a modeling approach, the authors elegantly demonstrat...
