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Neurophysiology

, Volume 1, Issue 2, pp 160–166 | Cite as

On the role of horizontal cells in the mechanism of retinal adaptation

  • A. L. Byzov
Article

Abstract

We recorded by intracellular means responses of horizontal cells of the turtle retina to light increase and decrease of different values against the starting adapting level. In measuring these responses, curves reflecting the dependence of membrane potential deflection on light intensity (amplitude characteristics — ACh) were plotted. It is demonstrated that the ACh of transitional processes (on- and off-peaks) is considerably steeper than ACh of the plateau of the potential, but embraces a much smaller range of light intensities (slightly more than 1 log. un.). During a change in intensity of the adapting background (up to 3 log. un.), the ACh of transitional processes shifts along the scale of light intensities in such a way that its steep part remains in the zone of adapting light. We followed the dynamics in time of ACh shift after the transition from one adapting brightness to another. The ACh of total impulse response was plotted for ganglionic cells of the turtle at different intensities of adapting light. Comparison of these curves with the ACh of horizontal cells shows that its peripheral components are responsible for adaptive shifts of ACh of the visual system and that horizontal cells play an important role in the mechanism of adaptation. It is hypothesized that adaptive ACh shifts are the consequence of positive feedback between the horizontal cells and receptors.

Keywords

Light Intensity Visual System Positive Feedback Impulse Response Small Range 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Literature cited

  1. 1.
    A. L. Byzov, "Horizontal cells of the retina — regulators of synaptic transmission," Fiziol. Zh. SSSR,53, 1115–1124 (1967).Google Scholar
  2. 2.
    A. L. Byzov and M. M. Bongard, "A cathode repeater for work with microelectrodes," Fiziol. Zh. SSSR,45, 111–113 (1959).Google Scholar
  3. 3.
    A. L. Byzov and L. P. Kuznetsova, "Adaptation of the visual system," Neirofiziologiya,1, 81–89 (1969).Google Scholar
  4. 4.
    A. L. Byzov and R. Khanich, "Intracellular recording of responses of different retinal cells in the frog and axolotl," Fiziol. Zh. SSSR,52, 250–257 (1966).Google Scholar
  5. 5.
    A. L. Byzov and Yu. A. Trifinov, "A hypothesis concerning electrical feedback between photoreceptors and neurons of the second order in the retina of vertebrates," in: Synaptic Processes [in Russian], Kiev (1968), pp. 231–245.Google Scholar
  6. 6.
    V. B. Val'tsev, "Regularities of reactivity of waves of the rhythmic electroretinogram as a consequence of steady light," Biofizika,9, 493–499 (1964).Google Scholar
  7. 7.
    E. M. Maksimova, "The influence of intracellular polarization of the horizontal cells on activity of ganglionic cells of the retina in fish," Biofizika,14 (1969).Google Scholar
  8. 8.
    T. Tomita, "Electrophysiological study of the mechanisms subserving color coding in the fish retina," Cold Spring Harbor Symp. Quant. Biol., (Sensory Receptors),30, 559–566 (1965).Google Scholar
  9. 9.
    T. Tomita, A. Kaneko, M. Murakami, and E. L. Paulter, "Spectral response curves of single cones in the carp," Vision Res., 7, 519–531 (1967).Google Scholar
  10. 10.
    J. Toyoda, H. Nosaki, and T. Tomita, "Light-induced resistance changes in single photoreceptors of Necturus and Gekko," Vision Res.,9 (1969).Google Scholar

Copyright information

© Consultants Bureau 1970

Authors and Affiliations

  • A. L. Byzov

There are no affiliations available

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