[Structural organization of caudate-frontal relationships in lower monkeys].

Cellular structure of the caudate nuclei has been studied in intact monkeys (Macaca rhesus and Papio hamadryas) after bilateral extirpation of the frontal area fields. Methods of retrograde cellular degeneration and quantitative analysis with application of the computer "Klassimat" have been used. Only in one macaca operated on, the frontal premotor and motor fields have been removed, in other monkeys the frontal fields have been predominantly removed. Only in one macaca operated on, a statistically significant decrease of the total fraction of neurons and gliocytes has been revealed in the caudate nucleus head, it is evidently resulted from extirpation of the fields situating in the cortical end of the motor analyser (fields 4, 6, 8). No direct axonal connections have been revealed between the caudate nucleus and the fields 9, 10, 47.