Аннотация:Brain mechanisms of subjective (internal) rhythmisation were examined in two experimental cases. One of the tasks was to combine acoustic rhythmic clicks as pairs, another was the task to combine the same monotone clicks as triples. With the method of factorial analysis it was figured out some types of specific variation of EVP form on the clicks, which took different place in patterns. Analysis of dynamics of activity of brain structures figured out some types of functional brain architectonics while subjects were performing a task of combining clicks. Specific cerebellum activation took place not only in rhythm perception but in subjects activity of integration of cognitive processes. This takes place when subject uses hierarchical strategy of rhythm perception.