时间频率变化对视神经炎阈值对比敏感度缺陷的影响。
The effect of temporal frequency variation on threshold contrast sensitivity deficits in optic neuritis.
作者信息
Hess R F, Plant G T
出版信息
J Neurol Neurosurg Psychiatry. 1983 Apr;46(4):322-30. doi: 10.1136/jnnp.46.4.322.
Abstract
The effect of increasing temporal frequency on contrast sensitivity anomalies in unilateral optic neuritis has been investigated. For 4 c/deg gratings no change in the deficit was observed at any temporal frequency whereas there was a tendency for the deficit to decrease with increase in temporal frequency for 0-5 c/deg gratings. The latter effect was not observed in a case of optic neuritis with severe deficit and not in two cases of other optic nerve pathology. An explanation based on the assumption that "threshold scotomata" might be present in cases of demyelinating optic nerve disease is proposed.
摘要
研究了增加时间频率对单侧视神经炎对比敏感度异常的影响。对于4周/度的光栅，在任何时间频率下均未观察到缺损有变化，而对于0 - 5周/度的光栅，缺损有随时间频率增加而减少的趋势。在严重缺损的视神经炎病例以及另外两例其他视神经病变病例中未观察到后一种效应。基于脱髓鞘性视神经疾病病例中可能存在“阈值暗点”这一假设提出了一种解释。
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