Abstract  The understanding of the interrelationshipbetween brain and mind remains far from clear.It is well established that the brain'scapacity to integrate information from numeroussources forms the basis for cognitiveabilities. However, the core unresolvedquestion is how information about the``objective'' physical entities of the externalworld can be integrated, and how unifiedand coherent mental states (or Gestalts) can beestablished in the internal entities ofdistributed neuronal systems. The present paperoffers a unified methodological and conceptualbasis for a possible mechanism of how thetransient synchronization of brain operationsmay construct the unified and relatively stableneural states, which underlie mental states.It was shown that the sequence of metastablespatial EEG mosaics does exist and probablyreflects the rapid stabilization periods of theinterrelation of large neuron systems. At theEEG level this is reflected in thestabilization of quasi-stationary segments oncorresponding channels. Within the introducedframework, physical brain processes andpsychological processes are considered as twobasic aspects of a single whole informationalbrain state.The relations between operational process ofthe brain, mental states and consciousness arediscussed.