[Ontogenetic specifics of organisation of the cortico-cortical connections of the cat primary visual cortex and lateral suprasylvian area].

A quantitative and qualitative analysis of distribution of initial cells that organize the cortico-cortical connections between area 17 and posterior-medial lateral suprasylvian area (PMLS) was carried out in 10 kittens (5- and 12-week old). A horseradish peroxidase labeling technique was used. PMLS area is the highest center of moving visual stimuli information processing. Certain ontogenetic peculiarities of the area 17 initial neurons regular (clustered) organization were revealed. An age-related decreasing of the area 17 initial neurons packing density was shown (from 125.19 +/- 69.75 cells/mm2, in 5-week kittens to 34.67 +/- 17.38 cells/mm2--in 12-week kittens (p = 0.05)). It was shown also that an increasing of striate cortex locus that contained a gross majority of marked neurons occurs from 5-th to 12-th postnatal week. Possible morpho-functional aspects of ontogenetic formation of connections between area 17 and area PMLS clustered structure and its possible relation to development of visual moving stimuli perception are discussed.