[Effect of heavy metal mixture on the main functions of the central nervous system].

The influence of heavy metals salts mix, the most widespread pollutants of Prydnieprovsky region natural reservoirs on animal behavioral reactions, memory processes and total bioelectric activity of various brain departments has been investigated. It was revealed that heavy metals consumption with drinking water results in the development of the neurotization processes, at that due to animals hyperactivity there is an exhaustion of nervous centers that is reflected by prolongation of immobility periods in animals. Increase of the latent period of conditioned reflex formation in the 8th radial labyrinth together with decrease of task fulfillment efficiency indicate deterioration of the training ability of these animals and impairment of their short-term memory.

[Effect of ecopathogenic environmental factors on the system of antioxidant defense in different parts of the rat brain].

Influence ofecopathogenic environmental (radiation-chemical) factors on activities of superoxiddismutase, catalase and total antioxidative activity (TAA) has been investigated in morphologically and functionally different parts of rat brain. It has been found that reaction of cells in brain cortex, subcortical structures and cerebellum to these factors in all cases is revealed through the antioxidant enzyme activities decrease in all studied brain structures but in various degrees. In brain cortex, which is characterized by higher metabolic level, functional complexity and specialization, the higher level of antioxidation defense is marked both in normal state and under the action of negative factors, that allows to maintain the prooxidation-antioxidation balance.

[Reciprocal interaction in human forearm muscles during passive and active rest].

The reciprocal interaction in the forearm flexor in the human subjects were determined in the time of passive and active rest, using H-reflex testing. H-reflex was evoked by stimulation of n. medianus after 1, 10 and 150 ms after conditioned stimulus.