Interactions and Feedbacks in the Turtle Retina

  • M. G. F. Fuortes
Part of the Proceedings in Life Sciences book series (LIFE SCIENCES)


Visual recognition in vertebrates requires the transformation of an optical image into a composite electrical signal generated by a mosaic of retinal photoreceptors. Faithful transcription could be obtained if photoreceptors were independent units, the response of each being controlled only by the light falling upon it. Indeed, independence of photoreceptors appears to be desirable for maximal spatial resolution of the image and it has often been assumed to be a basic principle of retinal organization (see e.g. Naka and Rushton, 1966). It was, therefore, a surprise to find that this is not the design employed in the retina.


Horizontal Cell Double Cone Green Cone Hyperpolarizing Response Blue Cone 
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© Springer-Verlag Berlin Heidelberg 1976

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  • M. G. F. Fuortes

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