V. M. Muraveiko

Learn More
Responses of single neurons in the lateral lobes of the medulla to stimulation of the electroreceptive system by homogeneous sinusoidal electrical and magnetic fields were investigated in acute experiments on the skateRaja radiata. Thresholds of neuronal responses to electrical stimulation varied from 0.03 to 10 µV/cm. The optimal frequency ranges for(More)
Single unit recording from the lateral line nerve of the lamprey revealed the existence of two types of afferents. One type reacts to electric fields (threshold 10-30 microV/cm) and is insensitive to weak mechanical stimuli. The other type is very sensitive to water displacement and does not respond to weak electric fields. The properties of the(More)
198 On the one hand, the large-scale experiment of the 20th century on transoceanic transfer of the red king crab Paralithodes camtschaticus from Kamchatka to the Barents Sea has resulted in the appearance of a new valuable object of fishery in this sea but. On the other hand, researchers now face a number of important problems related to the biology of the(More)
A large portion of the central nervous system of the skate Raja radiata was examined for responses related to single electroreceptor organs (ampullae of Lorenzini) or their groups. It was shown that electroreceptors project to the anterior lateral lobes of the medulla, caudal portion of the auricles and the mesencephalon. A topographic segregation of(More)
96 Leading countries of the world widely use marine mammals for solving underwater technical, rescue, and antisabotage problems [1]. Systematic studies aimed at solving scientific and practical problems have been performed using harp seals by Murmansk Institute of Marine Biology since 1984. In view of the fact that it is difficult to train adult animals,(More)
Intensification of economic activity in the Barents Euroarctic region (for instance, the onset of the development of shelf oilfields) is a challenge for new methods of ecological monitoring, indication of environment state in the general system of environmental monitoring, and evaluation of the possible consequences of the technogenic impact on the biota(More)
Spike discharges in nerve fibers, evoked by stimulation of electroreceptors by an electric field directed along the body axis (square pulses of current and a sinusoidal current) were recorded in the lampreyLamperta fluviatilis (L.). Excitation of electroreceptors was shown to arise through the action of the cathode. Minimal values of electric field at which(More)
The topical representation of individual electroreceptor organs (ampullae of Lorenzini) or groups of them on brain neurons of the thorny skate was investigated. The electroreceptor system was shown to be represented in the anterior lateral lobes of the medulla, the caudal portion of the auricles of the cerebellum, and the midbrain. In the medulla zones of(More)
The impulse activity of nerve fibres in response to electric pulses and sinusoidal electric current stimulation of the electroreceptors was recorded in Lampetra fluviatilis. The electroreceptors of lamprey were excited by cathodal stimuli. Thresholds for electric stimulation were in the range of 10-60 microV/cm. Optimum frequency range in uniform electric(More)
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(More)