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The electrical responses of the retinal receptors and the lamina in the visual system of the fly musca

Kybernetik volume 6, pages 149–162 (1969)Cite this article

Abstract

Slow electrical responses were recorded from receptors and from the lamina of the visual pathway of the fly Musca.

  1. (a)

    Receptors 1 to 6 in the retinal ommatidia are identified by their response dichroic sensitivity planes. The half-width of their angular sensitivity distributions is estimated 2.5° in dark adaptation, and found not to vary with ambient illumination. The retinula cells are only excited by light that enters the eye through their overlying corneal facets.

  2. (b)

    The responses of the lamina show no detectable dichroic sensitivity, though in favourable cases their angular sensitivity distributions may be as narrow as those of the receptors. It is shown that these responses are excited by light that enters the six facets of the corneal projection of the single lamina cartridge synapse. The retinula fibres of passage through the lamina, originating from ommatidial cells 7 and 8, evidently do not contribute excitation to the responses.

  3. (c)

    It is shown that the separate responses contributed by the individual receptors of the projection are added linearly at the lamina response compartment over a wide range of light intensities.

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Author notes

  1. John Scholes

    Present address: Laboratory of Experimental Psychology, University of Sussex, Brighton, UK

Affiliations

  1. Max-Planck-Institut für biologische Kybernetik, Tübingen

    John Scholes

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  1. John Scholes
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Scholes, J. The electrical responses of the retinal receptors and the lamina in the visual system of the fly musca. Kybernetik 6, 149–162 (1969). https://doi.org/10.1007/BF00274109

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  • DOI: https://doi.org/10.1007/BF00274109

Keywords

  • Visual System
  • Dark Adaptation
  • Visual Pathway
  • Electrical Response
  • Favourable Case