Journal of Comparative Physiology A

, Volume 129, Issue 3, pp 211–215 | Cite as

Activity of retinal class R3 ganglion cells in the Toad Bufo bufo (L.) in response to moving configurational stimuli: Influence of the movement direction

  • J. -P. Ewert
  • H. Krug
  • G. Schönitz


  1. 1.

    The question of the presence of functional symmetrical coupling in the excitatory receptive fields, ERF, of class R3 retinal ganglion cells (n = 25) was investigated by extracellular recordings from their fiber terminals in the optic tectum of Common Toads.

  2. 2.

    The relationship between neuronal discharge frequency and stimulus movement velocity was in part influenced by the direction of stimulus movement in the x,y-plane.

  3. 3.

    The sensitivity of class R3 neurons for different configurational moving stimuli as tested in this study, was maintained regardless of movement direction but was sharpest for movement in the vertical direction.

  4. 4.

    The distribution of excitation in the ERF was not quite symmetrical but the asymmetries appear to form no basis for the discrimination of moving configurational stimuli.



Vertical Direction Ganglion Cell Receptive Field Movement Direction Retinal Ganglion Cell 



excitatory receptive field


inhibitory receptive field


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  1. Barlow, H.B.: Summation and inhibition in the frog's retina. J. Physiol. (Lond.) 119, 69–88 (1953)CrossRefGoogle Scholar
  2. Beck, A., Ewert, J.-P.: Prey selection by toads (Bufo bufo L.) in response to configurational stimuli moved in the visual field z,y-coordinates. J. comp. Physiol. 129, 207–209 (1979)CrossRefGoogle Scholar
  3. Ewert, J.-P.: Der Einfluß von Zwischenhirndefekten auf die Visuomotorik im Beute- und Fluchtverhalten der Erdkröte (Bufo bufo L.). Z. vergl. Physiol. 61, 41–70 (1968)Google Scholar
  4. Ewert, J.-P.: The visual system of the toad: Behavioral and physiological studies on a pattern recognition system. In: The amphibian visual system. Fite, K.V. (ed.). New York, San Francisco, London: Academic Press 1976Google Scholar
  5. Ewert, J.-P., Hock, F.J.: Movement sensitive neurons in the toad's retina. Exp. Brain Res. 16, 41–59 (1972)CrossRefGoogle Scholar
  6. Ewert, J.-P., Seelen, W.v.: Neurobiologie und System-Theorie eines visuellen Muster-Erkennungsmechanismus bei Kröten. Kybernetik 14, 167–183 (1974)CrossRefGoogle Scholar
  7. Ewert, J.-P., Borchers, H.-W., Wietersheim, A.v.: Question of prey feature detectors in the toad's (Bufo bufo L.) visual system: A correlation analysis. J. comp. Physiol. 126, 43–47 (1978)CrossRefGoogle Scholar
  8. Ewert, J.-P., Arend, B., Becker, V., Borchers, H.-W.: Invariants in the configurational prey recognition system of the Common Toad Bufo bufo (L.). Brain Behav. Evol. (in press) (1979)Google Scholar
  9. Grüsser, O.-J., Grüsser-Cornehls, U.: Die Informationsverarbeitung im visuellen System des Frosches. Kybernetik 1968, 331–360. München: Oldenbourg 1968Google Scholar
  10. Hartline, H.K.: The receptive fields of the optic nerve fibres. Am. J. Physiol. 130, 690–699 (1940)Google Scholar
  11. Henn, V., Grüsser, O.-J.: The summation of excitation in the receptive field of movement sensitive neurons of the frog's retina. Vision Res. 9, 57–69 (1968)CrossRefGoogle Scholar
  12. Reuter, T.: Visual pigments and ganglion cell activity in the retinae of tadpoles and adult frogs (Rana temporaria). Acta Zool. Fenn. 122, 1–64 (1969)Google Scholar
  13. Wietersheim, A.v., Ewert, J.-P.: Neurons of the toad's (Bufo bufo L.) visual system sensitive to moving configurational stimuli: A statistical analysis. J. comp. Physiol. 126, 35–42 (1978)CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 1979

Authors and Affiliations

  • J. -P. Ewert
    • 1
  • H. Krug
    • 1
  • G. Schönitz
    • 1
  1. 1.Neuroethology and Biocybernetic LaboratoriesUniversity of KasselKasselGermany

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