固視機能--水平・垂直眼球運動下において

概要

論文の詳細を見る
Visual fixation of horizontal and vertical eye movements was examined by eye movements which were evoked by horizontal or vertical head rotation with eyes fixed on a target 90cm in front of the subjects and recorded by electronystagmography.1. Normal subjects showed smooth sinusoidal curves of horizontal or vertical eye movements evoked by horizontal or vertical head rotation with eyes fixed on a target.2. Pathological cases1) Failure of visual fixation was indicated by lack of smoothness of the sinusoidal curves. Failure of visual fixation of horizontal eye movements was seen especially in patients with cerebello-pontine angle lesions. Failure of fixation of vertical eye movements was seen in patients with midbrain lesions with upward vertical nystaamus or in those with downward vertical nystgamus. Fixation failure of horizontal and vertical eye movements appeared in patients with cerebellar lesions (cerebellar tumors, spinocerebellar degeneration, etc), in those with pontine lesions and parietal lobe lesions.Visual fixation seemed to be controlled by the center of horizontal and vertical eye movements as well as by the flocculus in the cerebellum and by the parietal lobes.2) Amplitudes of eye movements could be measured by this examination. Therefore, amplitudes of eye movements in patients with eye movement disturbance could be shown and measured.
耳鼻咽喉科臨床学会の論文