Table 1.

Descriptive characteristics of the healthy subjects and patients who participated in this study.

Parameters	Healthy	Vestibular bilateral	Vestibular unilateral	CANVAS
N	10	12	8	5
Sex ratio (male:female)	4:6	7:5	4:4	3:2
Mean age (min–max)	48 (27–76)	78 (58–91)	51 (30–70)	70 (54–86)
vHIT mean gain of vestibulo–ocular reflex	0.98 ± 0.04	0.43 ± 0.21	0.44 ± 0.11a	0.35 ± 0.26
			0.79 ± 0.1b

N, number of subjects; CANVAS, cerebellar ataxia, neuropathy, and vestibular areflexia syndrome; vHIT, video head impulse test.

^a represents vHIT gain on operated side.

^b represents vHIT gain on non-operated side.