Eye movements in dementia.

概要

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Eye movements were studied in 18 cases of cerebral lesions with dementia. Spontaneous nystagmus and gaze nystagmus were observed, and recorded by electronystagmography (ENG). Pursuit, optokinetic nystagmus, caloric nystagmus and visual suppression were examined. Disturbances of eye movements were seen in all cases of dementia.<BR>1. Alzheimer type dementia<BR>There was no gaze or spontaneous nystagmus. Very mild vertical postitioning nystagmus was seen, as well as saccadic and ataxic pursuit. Optokinetic nystagmus and visual suppression were normal.<BR>2. Multiple infarct dementia<BR>Disturbance of eye movements increased with the severing of the mental disorders. Pursuit eye movements, optokinetic nystagmus and visual suppression were greatly impaired in cases with lower parietal lobe lesions. There were no voluntary eye movements in the most severe cases. Eye movement disturbance was related to lower parietal lobe leisons.
一般社団法人日本めまい平衡医学会の論文