[Individual prognostic behavioral features in dogs during the choice between probability and value of reinforcement].

A strategy and latency of choice between the probability (100, 50, 30, 20 and 0% probabilities were tested) and value (high and low) of the reinforcement were investigated in dogs. The greatest differences in dogs' behavior were observed under conditions of uncertainty when the valuable reinforcement was presented with probabilities from 50 to 20%. According to subjective evaluation of uncertain situation, dogs were divided into "inclined to risk" (more frequently choosing low-probable but valuable food) and "careful" (more frequently choosing high-probable but less valuable food).

[Features of differential inhibition in choice between alimentary and defensive response].

Instrumental defensive (avoidance/escape) and alimentary responses (reinforced with palatable food) in dogs were conditioned by the same stimulus (6-Hz light flashes). Differential inhibition for these responses (0.6-Hz flashes) was formed in unalterable series.

[Functional regional asymmetry of the EEG intrahemispheric coherence in dogs during conditioning].

Individual features of the regional interhemispheric relations in the brain were studied in dogs during alimentary conditioning. The electrical activity was recorded from symmetrical anterior (frontal and motor cortices) and posterior (visual and auditory cortices) areas of the neocortex. Comparison between the averaged left and right intrahemispheric EEG coherences revealed a dynamic character of interhemispheric relations dependent on the stage of conditioning.

[Individual typological features of the dog behavior during the choice between food and avoidance of electrocutaneous stimulation].

Two conditioned reflexes (CR) on flash were elaborated in five dogs in three experimental series. In one of them pressing on pedal were constantly reinforced with two pieces of liver, in other--escape or avoidance of skin stimulation with lifting of leg. In a third series, series of reinforcement choice, in front of animal with electrodes, fasting on leg, put the pedal.

[Effects of prefrontal ablations on the reaction of the active choice of feeder under different probability and value of the reinforcement on dog].

The role of the prefrontal cortex was investigated on the reaction of the active choice of the two feeders under changes value and probability reinforcement. The experiments were performed on 2 dogs with prefrontal ablation (g. proreus).