pattern electroretinograms in response to sinusoidal gratings were recorded from 18 elder subjects (mean age 62.7 years) and 22 young subjects (mean age 27 years) by means of skin electrodes. All subjects were free from ocular pathology and their corrected visual acuity was 1.0 or better. In young s
Clinical application of the pattern electroretinogram with lid skin electrode
β Scribed by Y. Kakisu; A. Mizota; E. Adachi
- Publisher
- Springer-Verlag
- Year
- 1986
- Tongue
- English
- Weight
- 296 KB
- Volume
- 63
- Category
- Article
- ISSN
- 0012-4486
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β¦ Synopsis
Pattern evoked potentials were recorded simultaneously with an electrode placed on the skin of the lower eyelid, gold foil electrodes hooked on the right and left eyelids, and a skin electrode at Oz in normal subjects and in patients with optic nerve and macular diseases. Peak latencies and amplitudes of the pattern electroretinogram (PERG) were compared between the two electrodes.
In both records, the peak latency showed no difference at 56.7 -+ 2.9 ms (mean -+ S.D.), while the amplitude of the PERG with the lid skin electrode was at 1.2 -+ 0.3 #V, approximately one-third of that obtained with the gold foil electrode.
Although the skin electrode did not always record responses as well as the gold foil, its advantages recommend its use in clinical cases.
π SIMILAR VOLUMES
We have recorded both pattern and flash electroretinograms (ERG) in two patients with unilateral optic nerve damage due to optic canal fracture over one year. The pattern ERG from the affected eye was reduced in amplitude by approximately 40% in one patient, 60% in the other, compared with that from