前庭神経炎--神経耳科学的検査所見の推移 (前庭機能異常の研究-3-<特集>)

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Follow-up observation of patients with vestibular neuronitis was made neurotologically and their progress was evaluated. The observation period of the 30 patients (1972-1983) was one year and 5 months in average ranging from 5 days to 9 years 6 months. Eleven patients have been followed for over one year. The tests which were used to evaluate this series consisted of: examination of spontaneous nystagmus, head positional nystagmus, caloric nystagmus and computed galvanic body sway test (Yamaguchi University). Changes in subjective symptoms were described.1. Many patients complained of vertigo (whirling) (93%). Others had a floating sensation and unsteadiness of gait. Fifty per cent of the patients were relieved of vertigo in 3 months, whereas 5 patients suffered from an intractable dizzy sensation for over one year. Even after 3 years, 3 of these patients were troubled with the dizzy sensation. Other causative disease including central lesions were excluded in these patients.2. Spontaneous nystagmus, which was usually horizontal and with a fixed direction, remaineds in 50% of the patients after one year.3. All of those tested showed reduced caloric responses. Five of the 30 patients showed the null response in cold caloric (including ice water) stimulation. Four of them did not improve in the caloric test when tested approximately 2 years and 5 months in average after onset.4. The computed galvanic body sway test (Yamaguchi University) revealed a reduced response in the body sway induced by galvanic stimulation; slow response in body sway is peculiar to vestibular neuronitis. This slow response returned to a normal range in 68.4% of the patients in 2 years and 9 months.These findings suggested that the prognosis of vestibular neuronitis is poorer than generally expected.
耳鼻咽喉科臨床学会の論文

前庭神経炎--神経耳科学的検査所見の推移 (前庭機能異常の研究-3-<特集>)

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