A coincidence model of the processing of quantum signals by the human retina

Autor: Grind, W. A., Schalm, T., Bouman, M. A.
Zdroj: Biological Cybernetics; April 1968, Vol. 4 Issue: 4 p141-146, 6p
Abstrakt: Well-known theoretical concepts for visual threshold behavior are: 1. the quantum coincidence model which describes particularly threshold-dependence on presentation time and teststimulus geometry; 2. the quantum fluctuation model which includes description of thresholddependence on luminance and color of a masking background. In this paper it is demonstrated that analog models of static as well as dynamic inhibition in the retina can be extended to more realistic stochastic models. This can be done by consideration of the coincidence operations as expressed in the quantum coincidence and quantum fluctuation models for visual threshold behavior. In this model coincidence detectors indicated as C-gates are the essential components. It is demonstrated that threshold-gates as are frequently used in models in neurophysiology do not permit development of the more realistic asynchronous circuits. Further it is pointed out that electronic neuron models and stochastic and nonstochastic models of nerve-functions of other authors in fact are either special simplifications of the proposed C-gates or lead naturally to C-gates for their further development.
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