XIII Hypnosis and Vestibular Function

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Abstract
Differentiation between the hypnotic state and sleep is suggested by the ability to make a motor response to a command or auditory signal and in the absence of functional blindness. Slow oscillations of the eye may occur without other evidence of sleep. In the hypnotic state the EEG resembles that of the awake state. A consistent suppression of caloric induced nystagmus may occur in the hypnotic state. The hypnotic state may be terminated abruptly as reflected in the prompt return of nystagmus. The well known observation, that at times caloric nystagmus may cease or become dysrhythmic, yet be promptly restored by "alerting," may have similar neurological correlates .