[Status of higher nervous activity and various indices of experimental-psychological examinations of the aged].

On the basis of a comprehensive experimental-psychological examination of clinically healthy people of advanced age groups, the authors have established the main regularities of changes in mental activity with age. It is demonstrated that deterioration of memory, attention and apractognostic processes is largely due to a reduction in the tone of the brain cortex. The normative parameters of the functional mobility and mental working ability are presented for people aged 20 to 100 years.