[人视网膜电图中暗适应和明适应振荡电位的特征]
[Characteristics of dark-adapted and light-adapted oscillatory potentials in human electroretinogram].
作者信息
Yin Juan-ping, Lei Bo, Peng Hui, Wang Jun, Fu Xiao-nan
机构信息
Department of Ophthalmology, Chongqing Medical University, Chongqing, China.
出版信息
Nan Fang Yi Ke Da Xue Xue Bao. 2011 Dec;31(12):2057-60.
OBJECTIVE
To characterize dark-adapted and light-adapted oscillatory potentials (OPs) in human electroretinogram (EGR) elicited by flashing light stimulation of the same intensity.
METHODS
Dark- and light-adapted ERGs of normal eyes were studied. The frequency spectra of the extracted dark-adapted OPs and light-adapted OPs were analyzed by a fast Fourier transform. The peak frequency, latency and total power of the OPs were determined.
RESULTS
The averaged peak frequency, latency, and power of the dark-adapted OPs was 125.3∓9.93 Hz, 41.7∓3.56 ms, and 9.25∓5.55 (V·s)(2), as compared with 79.5∓6.79 Hz, 50.8∓5.36 ms, and 3.56∓2.18 (V·s)(2) for light-adapted Ops, respectively, showing significant differences in the parameters between dark- and light-adapted Ops (P<0.001).
CONCLUSIONS
Compared with dark-adapted OPs, light-adapted Ops is characterized by a lower peak frequency and a lower power with a prolonged latency.
目的
对相同强度闪光刺激诱发的人视网膜电图（ERG）中暗适应和明适应振荡电位（OPs）进行特征描述。
方法
研究正常眼的暗适应和明适应ERG。通过快速傅里叶变换分析提取的暗适应OPs和明适应OPs的频谱。测定OPs的峰值频率、潜伏期和总功率。
结果
暗适应OPs的平均峰值频率、潜伏期和功率分别为125.3±9.93Hz、41.7±3.56ms和9.25±5.55（V·s）²，而明适应OPs分别为79.5±6.79Hz、50.8±5.36ms和3.56±2.18（V·s）²，暗适应和明适应OPs的参数存在显著差异（P<0.001）。
结论
与暗适应OPs相比，明适应OPs的特征是峰值频率较低、功率较低且潜伏期延长。
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