Abstract

1. 1. Transduction and transmission in catfish ampullary electroreceptors is mediated by sensory cells bearing microvilli, chemically mediating synapses, nerve terminals and one axon. Although some aspects still remain to be clarified, a number of properties have been found. 2. 2. Spike generation per seand the modulation of spike frequency by electrical stimuli behave differently with respect to a number of experimental factors. 3. 3. Stimulus current enters presumably through non-voltage-sensitive or non-specific ion channels. 4. 4. Fluctuations of the spike frequency may be used as a measure for proper functioning of this sense organ.

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