[Isometric forces generated by the human wrist: force trajectories with and without a visual target].

The force trajectories of isometric wrist flexor efforts and corresponding EMG activity of forearm muscles were studied in healthy subjects. A target effort of 50 N was developed after the sound signal: the target level and force trajectory were displayed on the TV indicator. Force trajectories under conditions of visual control, kinesthetic control (without a visual target) and with random alternation of these regimens were compared.

[Determination of the topical organization of the discharges of identified mollusk neurons].

Identified RPa1, RPa2 neurons of the right parietal ganglion of Planorbis corneus were investigated. Coherent analysis of accumulated electrical activity in periferal nerves and spike discharges in identified neurons was done. Using this analysis, the presence of axon processes of RPa1 and RPa2 cells in the left and right pallial nerves was determined.

[Wiener analysis of transmission of signals of identified mollusk neurons].

Mathematical model of spike train transmission by identified neurons of the mollusc Planorbis corneus was obtained by means of Wiener analysis. Poisson distributed sequences of near-threshold stimuli were used as input trains for construction and testing. It was shown that addition of terms sensitive to the nonlinear properties of the synapse-neuron system to the model decreased the model error from 25% to 16%.

[Deterministic and stochastic identification of neurophysiologic systems].

The paper deals with deterministic and stochastic identification methods applied to the concrete neurophysiological systems. The deterministic identification was carried out for the system: efferent fibres-muscle. The obtained transition characteristics demonstrated dynamic nonlinearity of the system.