The fine structure of multifocal ERG topographies.
The fine structure of multifocal ERG topographies.
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多焦点 ERG 地形的精细结构。
DOI：
10.1167/2.8.5
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发表时间：
2002
影响因子：
1.8
通讯作者：
Sutter,ErichE
中科院分区：
文献类型：
--
作者：
Poloschek,CharlotteM;Sutter,ErichE
多焦点视网膜电图（mfERG）允许通过同时从大量视网膜位置获得响应来进行功能场映射。最常用的刺激分辨率由103个六边形元素组成。这里，我们用一个包含509个元素的数组进行刺激。为了确定多焦ERG显示解剖和生理细节的程度，例如视网膜血管投下的阴影，我们使用两种不同的刺激亮度水平和三种光谱从两个受试者获得了mferg。一些凹陷与大血管吻合良好，提示有相对血管瘤。然而，一些可重复的局部凹陷不能归因于视网膜上的血管阴影，而更可能反映了生理反应特征的局部不均匀性。
The multifocal electroretinogram (mfERG) allows for functional field mapping by concurrently deriving responses from a large number of retinal locations. The stimulus resolution most commonly used consists of 103 hexagonal elements. Here, we stimulated with an array of 509 elements. To determine the extent to which the multifocal ERG shows anatomical and physiological details, such as shadows cast by the retinal vasculature, we obtained mfERGs from two subjects using two different stimulus luminance levels and three light spectra. Good correspondence of some depressions with major blood vessels suggests relative angioscotomata. However, some reproducible local depressions cannot be attributed to blood vessel shadows cast on the retina, but more likely reflect local inhomogeneities in the physiological response characteristics.