[Temporal organization of the excitation summation effect during interaction between self-stimulation zones].
The analysis has been conducted of changes of histograms of pressing and pauses duration at self-stimulation (SS) of certain cerebral zones under the influence of motivational and reinforcing stimulations of other cerebral zones, performed at different phases of SS: in the moment of pedal pressing; 0.1; 0.3; 0.5; 0.7 s from the beginning of the pedal pressing and in the moment of its releasing. In the case of delay of motivational stimulation from the moment of pedal pressing a gradual reduction has been observed of relative duration of pressings (sign of rewarding SS effect) and pauses (sign of driving SS effect). Motivational stimulation performed at the moment of pedal release, elicited the greatest inhibitory effect. Reduction of SS-frequency was accompanied by the appearance of consummatory reactions. Delay of the reinforcing stimulation reduced the efficiency of its intensifying influences on the rewarding SS effect (expression of summation effect) and enhanced its influence on the driving effect. The common character has been shown of motivational and disrupting mechanisms of SS, on the one hand, and rewarding mechanisms--on the other hand.
D000818:Animals; D001931:Brain Mapping; D007026:Hypothalamic Area, Lateral / Q000502:physiology*; D008297:Male; D009434:Neural Pathways / Q000502:physiology; D011301:Preoptic Area / Q000502:physiology*; D051381:Rats; D012054:Reinforcement, Psychology; D012201:Reward; D012653:Self Stimulation / Q000502:physiology*
Vremennaia organizatsii éffekta summatsii vozbuzhdeniĭ pri vzaimodeĭstvii zon samorazdrazheniia.