Unidirectional optokinetic training modifies the response pattern of bidirectional vestibular stimuli (angular acceleration), resulting in an initial response increase, followed by a progressive response decline, affecting only nystagmus amplitude and slow phase velocity, whereas frequency remains constant.
Optokinetic training obviously has a facilitating effect on vestibular habituation. This facilitation mechanism of repeated visual stimulation becomes most evident when low-intensity vestibular stimulation is used. There is a marked difference between the habituating effect of high- and low-intensity stimulation, because repetitive application of weak vestibular stimuli does not succeed in inducing response decline unless it is preceded by intensive optokinetic training.
Pfaltz CR, Kato I. Vestibular Habituation: Interaction of Visual and Vestibular Stimuli. Arch Otolaryngol. 1974;100(6):444–448. doi:10.1001/archotol.1974.00780040458007
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