The influence of adaptation on the oscillatory potentials of the human electroretinogram

Abstract

The influence of adaptation on the oscillatory potentials of the human electroretinogram was studied in the domains of frequency and time. The amplitude of OP1 to OP4, the summed amplitude of OP1 to OP4, as well as the area, decreased from dark adaptation to light adaptation. With increasing intensities of background illumination, they increased slightly and appeared to decrease with the strongest background illumination. The implicit time of oscillatory potentials 3 and 4 increased with stronger background illumination and decreased with the strongest background illumination. The results of the dominant frequency and the total power of the OPs correspond to the results in the time domain. The dominant power decreased from dark adaptation into light adaptation and did not show any systematic changes with increasing intensity of background illumination.

Background light adaptation of the retinal neuronal adaptive system. II. Dynamic effects

“…However, it is noteworthy that of the suppressed ERG modalities, the oscillatory activity was comparatively less affected, indicating a relatively more robust function of the OP regenerating structures in stressed operational conditions. A similar influence of light adaptation on the oscillatory response in the human ERG was reported, including the decrease of the OPs in response to intense BGLs [40]. However, neither an explanation for the decrease of the oscillatory response was attempted, nor were the adaptational effects on the a-and b-waves presented in that study [40].…”

“…A similar influence of light adaptation on the oscillatory response in the human ERG was reported, including the decrease of the OPs in response to intense BGLs [40]. However, neither an explanation for the decrease of the oscillatory response was attempted, nor were the adaptational effects on the a-and b-waves presented in that study [40].…”

Exploring the impact of ecstasy on retinal physiology: A pioneer study

“…In the rising phase of b-wave, high-frequency wavelets can be identified, called oscillatory potentials (OPs) (Li et al, 1991). These low amplitude oscillating waves are believed to reflect the inhibitory feedback circuits in the inner part of the retina initiated by amacrine cells (Wanger & Persson, 1984;Li et al, 1991;.…”

Hyper‐response of OP3 to systemic hyperoxia in the dark‐adapted retina

“…The number of OPs contained in the OP complex may vary according to various factors such as the level of retinal light‐adaptation (Li et al. , 1991; Peachey et al.…”

“…The number of OPs contained in the OP complex may vary according to various factors such as the level of retinal light-adaptation (Li et al, 1991;Peachey et al, 1991;Kuze and Uji, 2005); the color of the flash and background light used for their recording (Kergoat and Lovasik, 1990); and the species under study (Wachtmeister and Dowling, 1978). The individual OPs have been shown to vary differentially under various stimulus/ recording parameters (Coupland, 1987a;Lachapelle, 1991;Tremblay and Lam, 1993;Jana´ky et al, 1996) as well as physiological Lovasik, 1990, 1992;Jana´ky et al, 1996;Kergoat and Forcier, 1996) or pathological (Coupland, 1987b;Brinchmann-Hansen et al, 1992;Lachapelle et al, 1998;Lubinski et al, 2003;Liu et al, 2006) stress factors.…”