In accordance with the contemporary understanding, the structure of individual experience can be considered as the subject of psychology (Ponomarev, 1983). The structure of individual experience captures all relevant interactions of the individual with the environment. Individual interacts with many different subject areas, and in this regard, the experience can be divided into domains. For understanding the organization of the whole structure of individual experience, it is important to consider the formation of its specific element in relation to the components of other domains of experience. Individual experience elements are represented by groups of neurons, specialized in relation to systems of behavioral acts. In accordance with the principle of systemic specificity of neuron, activity of neurons, specialized in relation to a specific system, reflects its state during realization of the structure of individual experience in behavior (Shvyrkov, 1995). Activity of a specialized neuron in nonspecific acts reflects the degree of actualization of the specific component of experience and reveals the existence of certain relationships in the structure of individual experience between the ongoing system and the system to which the recorded neuron belongs.
The basic form of behavior to determine the behavioral specialization of neurons was a model of instrumental cyclic food-acquisition behavior of rats in a cage with two pedals and feeders. This behavior when compared to the activity of single neurons allows to define accurately their specialization. As other forms of behavior we used defensive, tentative, comfortable, interindividual, drinking and searching behaviors. Analysis of retrosplenial cortex neurons activity revealed different relationships between the elements of different domains of individual experience. For example, many of the elements of instrumental food-acquisition behavior were activated in passive avoidance, when the animal was lifted into the air by the experimenter. It was also revealed in some cases the absence of certain relationships between components, such as food-acquisition behavior and comfortable. To build a more complete picture of cross-domain relationships require registration of neurons specialized in relation to acts of other behaviors.
The study was supported by a grant RHSF # 11-06-00917a and the grant Council of the President of the RF for the Leading Scientific Schools NSh-3010.2012.6.