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 task was to combine the same monotone clicks as triples. With the method of factorial analysis some types of specific variation of EVP form on the clicks which took different place in patterns were figured out. Analysis of dynamics of brain structures activity revealed some types of functional brain architectonics while subjects were performing a task of combining clicks. Specific cerebellum activation took place both in rhythm perception and in subject’s activity of integration of cognitive processes. This took place when subject used hierarchical strategy of rhythm perception.