[Comparative study of the rod and cone contributions to the generation of b-wave ERG and tectal evoked potential in the dark-adapted carp].

Amplitudes and peak latencies as functions of wave length and monochromatic light intensity were investigated for b-wave ERG and tectal evoked potentials (EP) in the dark-adapted carp (Cyprinus carpio L). It was found, that independently of light intensity b-wave action spectra had one maximum in the medium wave band, corresponding to rod sensitivity area. For tectal EP, similar action spectra with maximum in the middle-wave were seen at low light intensity only.

[Forecasting parameters of acute chemical toxicity according to in vitro conformation changes of proteins].

The authors analyze experimental data on in vitro effects induced by chemicals that were used throughout MEIC toxicologic studies in ovalbumin and acetylcholinesterase of human RBC. Influence on proteins is compared to acute toxicity caused by the chemicals in humans and various cell lines. The conclusion is that the method is prospective for screening of acute chemical toxicity signs in humans.

[Directed attention influence on the human brain potentials under conditions of probability visual stimulation].

Saccadic latency and averaged EEG-potentials connected with switching on of the set and cue visual stimuli were examined in 12 right-handed healthy subjects in M. Posner's "cost-benefit" experimental paradigm. It was shown that attention was reflected in parameters of positive potential P100 evoked by switching on of set and cue stimuli and P300 and slow positive wave PMP1 evoked by switching on of the set stimulus in the relevant conditions.