A study of the connectedness among distant neuronal populations in the human brain during mental activity

In this article, we present the results of a study of connectedness among distant neuronal populations in human deep-brain structures. The time characteristics involved and the stability of the connections between different neuronal populations during monotonous mental activity are discussed. We show that a stable connectedness does correlate with mental activity; however, the connections themselves do not correlate with one another. We also show that the individual connections, the elements of the system which make mental activity possible, can function with various degrees of rigidity or flexibility.