[Frequency characteristics of central neurons of the electroreceptor system of the skate in response to exposure to electric and magnetic fields].

Responses of single units to sinusoidal homogenous electrical and magnetic field stimulation were studied in the lateral-line lobes of the skate Raja radiata. The voltage gradient thresholds were in the range of 0.03-10 microV/cm. Optimal frequency ranges for electrical and magnetic stimuli were 0.05-0.5 and 2-3 Hz, respectively. Possible mechanisms and functional significance of frequency characteristics of the neurons are discussed.