抄録
Vestibuloocular reflex (VOR), optovestibular reflex (OVR) and cervicoocular reflex (COR) were quantitatively analyzed in 21 healthy subjects using damped pendular rotation (DPR) in the yaw plane. VOR and OVR gains showed constant values irrespective to head angular velocities; the mean VOR gain was 0.58 (SD 0.17), and that of OVR gain was 0.85 (SD 0.25) at 0.22Hz of DPR. There was a significant difference between VOR and OVR gains (P<0.01, t-test). COR was almost absent and was not measurable in 6 subjects of the 21. Six other subjects showed constant gain (mean 0.16, SD 0.06) over the course of DPR (frequency 0.33Hz). The remaining 9 subjects showed gain enhancement at later cycles (3rd to 5th cycles) of DPR. The mean COR gain of this group was 0.81 (SD 0.30). Cervically induced eye deviation occurred in an anticompensatory mode in most of the cases with the mean phase advancement of 82°(SD 33.6°). There was no significant correlation between VOR and COR gains in healthy human subjects.
