水平頭振後眼振検査(HSAN test)の臨床的ならびに実験的研究

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  • 古川 裕
    大阪厚生年金病院耳鼻咽喉科 大阪大学医学部耳鼻咽喉科学教室

書誌事項

タイトル別名
  • CLINICAL AND EXPERIMENTAL STUDIES ON HORIZONTAL HEAD SHAKING AFTERNYSTAGMUS TEST. (HSAN TEST)
  • ミズ ヒラアタマ シンゴ ガンシン ケンサ HSAN test ノ リンショウ

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説明

Shaking of the head may be followed by nystagmus in some instances. There has been no established theory about the way of head shaking or the responsible site for the resulting nystagmus. Thus, the author tried to establish the effective way to head shaking and to clarify the responsible site for development of nystagmus following head shaking in search of proper treatment for vertigo or disturbed sense of equilibrium.<br>Horizontal head shaking performed by the author as a clinical test failed to cause nystagmus in healthy subjects. From the result on experiments in rabbits and in clinical study in which the subjects were stimulated on their inner ear and on the cervix either separately or simulatenously, development of head shaking afternystagmus (HSAN) was possibly triggered by stimulation of the peripheral labyrinth. In HSAN test, however, the patient's neck is also twisted by head shaking and this caused the marked change of the peripheral blood flow of the vertebralbasilar artery, That was probably the reason why HSAN more frequently developed in insufficiency of the vertebral-basilar arterial circulation than in disturbances of the peripheral labyrinth.<br>It means that the site which should be regarded as the most important responsible site for development of nystagmus following head shaking would be the vertebral-basilar artery, followed by the peripheral labyrinth, the cerebral stem and soft tissues at the cervix. The test adopted by the author was simple and useful for establishment of the responsible site for vertigo and disturbed sense of equilibrium as well as for observation of the patient's clinical progress.

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