On the influence of vestibular tonic reflex on Nystagmus of eye caused by exstirpation of a labyrinth of one side
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The author observed, by measuring the limiting load of eye muscle in case of Nystagmus which he formerly reported, the influence of vestibular tonic reflex of eye on Nystagmus caused by breaking of a labyrinth of one side and he obtained the following facts:1) The limiting load, of an eye muscle in case of Nystagmus caused by breaking of one labyrinth being broken, shos a definite increase as well as decrease by changing the position of its head in space and a limiting load of an eye muscle, which Tonus increases reflectively and tonically always, increases; in this case that of the antagonist decreases.a) When the head is posed vertically upward at 90° both the positive index of M. obliq. sup. and negative index of M. obliq. inf. are the greatest; other four muscles show a slight negative index.b) When the head is posed downward vertically at 90° M. obliq. inf. shows the greatest positive index and M. obliq. sup. the greatest negative index, and the rest four muscles show a slight negative index.c) When the head is posed to one side at 90°, the labyrinth of its upper side being broken, all eye muscles decrease remarkably their limiting load, especially M. rect. sup. and inf. show their negätive index decreased.d) When the head is posed to one side at 90°, the labyrynth of its under side being broken all eye muscles show remarkable increase of their limiting loads, especially M. rect. sup. shows the greatest positive index.2) It is generally believed that the vestibular tonic reflex of eye does not exists in M. rect. int, and ext. but in his experiments the auther recognised that these muscles also feel a slight influence on each pose of head above mentioned.3) To sum up the influence of vestibular tonic reflex of eye on the above mentioned spontaneous eye-nystagmus, that influence appears quite clearly without any concern to the adequate position of aflow of the Endolymph.
- 耳鼻咽喉科臨床学会の論文
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関連論文
- On the influence of vestibular tonic reflex on Nystagmus of eye caused by exstirpation of a labyrinth of one side
- A study of the dynamics of the vestibular nystagmus
- A contribution to the knowledge of the slow and quick components in nystagmus by irritation of one labyrinth