A topographic study of oscillatory potentials in man.
A topographic study of oscillatory potentials in man.
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人体振荡电位的地形学研究。
DOI：
10.1017/s0952523800006696
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发表时间：
1995
影响因子：
1.9
通讯作者：
Sutter,EE
中科院分区：
文献类型：
--
作者：
Wu,S;Sutter,EE
本研究的目的是评价慢多焦m序列刺激在分析视网膜振荡电位(OPs)的地形图分布和潜在机制(包括非线性)方面的应用。M序列技术为我们提供了识别和表征信号源的两种重要手段，使我们能够了解OP的响应地形和非线性特性。在这项研究中，我们将OP分解为一阶和二阶分量，并研究了它们的形貌和亮度相关性。一阶和二阶OP成分的分布与Sutter和Tran(1992)研究的Nicker ERG显著不同。在有利于杆状和锥体活动的偏心率和亮度水平下，二级OPs尤为突出，表现出最清晰、最复杂的波形。在强烈的杆状漂白背景下，二级OPs的地形分布显示出杆状和锥体分布的组合特征，二级OPs被消除，一阶OPs的幅度减小，潜伏期移位。这些结果与Ops的二级分量主要由杆锥相互作用的贡献相一致。
The purpose of this study was to evaluate the use of slow multifocal m-sequence stimulation in analyzing the topographic distribution and underlying mechanisms (including nonlinearities) of the retinal oscillatory potentials (OPs). In giving us access to the response topography and the nonlinear characteristics of the OP,, the m-sequence technique provides us with two important means for the identification and characterization of the signal sources. In this study, we analyzed the OPs into the first- and second-order components and investigated their topographies and luminance dependence. The distribution of both the first- and second-order OP components differed significantly from that of the nicker ERG investigated by Sutter and Tran (1992). At eccentricities and luminance levels favoring activity by both rods and cones, the second-order OPs were particularly prominent showing the most clear-defined and complex waveform The topographic distribution of the second-order OPs showed combined features of both rod and cone distributions On a strong rod-bleaching background the second-order OPs were eliminated and the first-order OPs showed a reduced amplitude and a shifted latency These results are consistent with the notion that the second-order component of the OPs is dominated by contributions from rod-cone interactions.