[Effect of preparations altering cAMP metabolism on the bioelectrogenesis of the skeletal muscles].

In the frog isolated m. sartorius, microelectrode technique and in vivo TV microscopy differentiating bioelectrical phenomena in separate fibers of different groups (dark, light, intermediate), revealed that the drugs altering cAMF exchange (adrenaline, caffeine, imidazole) and used in concentration 10(-5) M, affect to different extents the resting potential and the AP. The effect of the drugs is more obvious in respect to excitatory potential.

[Changes in the bodies of trained and untrained subjects working to capacity and having different degrees of motivation].

In conditions of enhanced motivation trained subjects performed a greater work and untrained ones--a lesser work than under ordinary motivation. The most stable parameters in regard to working to capacity were as follows: heart rate, minute respiratory volume, amount of oxygen consumption, amount of exhaled CO2, energy expenditure, and oxygen pulse. The data obtained show that untrained subjects under ordinary and, particularly, enhanced motivation for working to capacity are able to mobilize a lesser amount of the organism's physiological reserves than trained people.

[Interrelation of visual and auditory analyzer functions during extreme stimulation].

By psychophysiological methods the effect of intensive photostimulation on the functional state of the optic analyzer and the influence of extreme optic stimulus on the hearing function were studied. An impulse acoustic stimulus contributed to the recovery of peripheral light sensitivity, left unchanged the central light sensitivity, improved acuity of color distinction, expanded the field of vision of red and green colors and reduced electric sensitivity and critical frequency of disappearance of light flashes. After an exposure to a superbright flash a decrease of absolute thresholds of hearing, electric sensitivity and critical frequency of fusion of electric stimulation of the acoustic analyzer was detected.