頭部外傷性眩暈症について

概要

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The author have studied in 274 cases with posttraumatic vertigo from the observation of optokinetic and vestibular nystagmic reaction. The results obtained are summarized as follows;1) Of the total 274 cases, the spontaneous nystagmus was observed in 138 cases (49%) and the positional nystagmus in 190 (69%).2) Pathological findings of optokinetic nystagmus, for example, optokinetic inversion, inhibition or interruption of optokinetic nystagmus, hyperexcitability of optokinetic secondary phase, dissociation between the direction of optokinetic and vestibular DP, were highly observed in patients in cases with the central damage. Therefore, the test of optokinetic nystagmus is of vital importance for differentiation of posttraumatic vertigo.3) By the test for torsion or extension of the neck, nystagmus was frequently provoked especially in cases with central damage, therefore, this test is of vital importance for the diagnosis of posttraumatic cervical syndrome.4) To speak the singularity of posttraumatic vertigo, the following will be mentioned.(1) The determination for the localisation of the lesions is usually difficult.(2) Most of these cases have no neurological findings.(3) Pathological nystagmic reaction was only observed in cases of the brain-stem lesions.(4) Symptoms and nystagmic reaction are unsettled for long period of time.
社団法人日本耳鼻咽喉科学会の論文