[Activity of central neurons of the electroreceptor system of Glyptosternum reticulatum].

Acute experiments with extracellular recording of pulse activity from neurons of lateral lobes of the Turkestan catfish Glyptosternum reticulatum revealed tonic and phasic neurons. Tonic neurons as compared to phasic ones were more sensitive to a potential gradient in water and has spontaneous activity. Phasic neurons had no spontaneous activity, their responses did not depend on the intensity and duration of electric stimuli.

[Functional characteristics of the electroreceptors of the Turkestan catfish].

Experiments with recording of single fibre impulse activity from lateral-line nerve in Turkestan catfish (Glyptosternum reticulatum) show that the fish has a high-sensitive electroreceptor apparatus (threshold value in a uniform electric field was 1 muV/cm). The effective stimulus for the electroreceptors is the voltage drop across the fish skin. Impulse reactions to magnetic stimulation as well as thermal and mechanical sensitivity of the electroreceptors were observed.