A Model for Continuous Neuroelectric Activity : The Encoding of Stimulus Intensity.
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Applies the idea of large-amplitude depolarizations in dendritic regions to the intensity dependence of graded potentials in the vertebrate retina. The model assumes that membrane in dendritic regions of primary afferents is linear, that receptors excite primary afferents by a synaptic mechanism that is continuously active during stimulation, and that the magnitude of the permeability change depends linearly on stimulus intensity. Comparison of the results with electrical data suggests that such a synaptic mechanism might represent the source of logarithmic intensity encoding. Psychological intensity data and possible applicability to other sensory modes are briefly discussed. 36 pp. Ref.
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