THE PROBLEM OF INDIVIDUAL VARIABILITY IN HUMAN BRAIN STRUCTURE

Series of frontal sections, 20 mum thick, were used to study the indiv idual cytoglioarchitectonic features of fields 8,8, 39, 40, 41, 43, 44 , 45, 47 of the caudate nucleus, dorsomedial nucleus of the thalamus, Meynert's nucleus in 12 persons aged 29 to 89 years. The profile field s of neurons, their density and the density of gliocytes, including pe rineuronal ones were measured by computed morphometry, the cellular co mposition was determined from the size of neurons, as well as the neur oglial and neuroperineuronal indices were defined. In 6 cases (disting uished, gifted persons), all the formations under study showed structu ral signs (abundant satellitosis, predominant large.neurons, etc.) sug gesting that there is a high functioning of nerve cells whose quantita tive parameters are greater than those in other cases.