White matter is an anatomical bases of brain integration realization, it provides the connection between different cortex zones inside one hemisphere as well as other hemisphere. Hemispheric interaction research is basic aspect of brain integration activity problem. Not less important is the aspect related with the processes of IAI.

Evaluation of method by fixed set potential for neuropsychological research of inter-analyzer interaction.

Russian neurophysiologists confirmed the presents of nervous processes irradiation and considered it as fundamental mechanisms of the higher functions realization. IAI is a particular case of the irradiation.

Uznadze's fixed set method allows one to model “section of behavior”, which includes all general behavior mechanisms and provides a way to analyze complicated forms of activity. The central components of the set are related to different brain systems and analyzer's interactions. This is confirmed by the set irradiation experiments, performed by Uznadze's school and showed that the set forms in one sensory modality manifests in different.

Setting experiments by formation of fixed set are done at haptic sphere: two different in volume spheres are given into both respondents’ palms. Critical experiments are done at visual sphere: two equal in diameters circles are exhibited to respondent for comparison. The amount of illusion in visual modality is an index of IAI features.

The fixed set method acquires a special relevant at the modern stage of clinical psychology development, since the IAI research seems to be important in psychiatric and neurological diseases, related with brain integration disorders.

The authors have not supplied their declaration of competing interest.