Lachapelle P, Benoit J
Department of Ophthalmology, McGill University-Montreal Children's Hospital, Quebec, Canada.
Doc Ophthalmol. 1994;86(1):33-46. doi: 10.1007/BF01224626.
We examined the possibility that the 100- to 1000-Hz oscillatory potentials could represent the derivative version of the 1-1000-Hz electroretinogram. Corneal electroretinograms were recorded from rabbits by means of bandwidths of 1-1000 Hz, 10-1000 Hz, 30-1000 Hz and 100-1000 Hz (6 dB of attenuation). Derivatives of the 1- to 1000-Hz electroretinogram had a waveform similar to the 100- to 1000-Hz signals, but of larger amplitude (21.9% +/- 16.7% larger, n = 16). Similarly, integration of the 100- to 1000-Hz signal resulted in a waveform whose amplitude was 60% of the original 1- to 1000-Hz electroretinogram. Our results suggest that some aspect of the morphologic changes seen when the low-frequency cutoff of the recording bandwidth of the ERG is increased from 1 Hz to 100 Hz could be explained with a simple derivative model. The oscillatory potentials may be significant contributors to the morphogenesis of the 1- to 1000-Hz electroretinogram.
我们研究了100至1000赫兹的振荡电位是否可能代表1至1000赫兹视网膜电图的导数形式。通过1至1000赫兹、10至1000赫兹、30至1000赫兹和100至1000赫兹（6分贝衰减）的带宽记录兔的角膜视网膜电图。1至1000赫兹视网膜电图的导数具有与100至1000赫兹信号相似的波形，但幅度更大（大21.9%±16.7%，n = 16）。同样，100至1000赫兹信号的积分产生的波形幅度为原始1至1000赫兹视网膜电图的60%。我们的结果表明，当视网膜电图记录带宽的低频截止从1赫兹增加到100赫兹时，所观察到的形态学变化的某些方面可以用一个简单的导数模型来解释。振荡电位可能是1至1000赫兹视网膜电图形态发生的重要因素。
