In result study of structural organization of neural receptive fields (RFs) and their different zones on the prestriate cortex level was shown that neural RFs in this area have hypercomplex structure and consist of some spatial different excitatory zones. Orientation and velocity selectivity and spatial-frequency characteristics of the excitatory zones of… (More)
As a result studying the features of single neurons of prestrial cortex (field 21) of a cat the interhemispheric differences are revealed. It is found that the sizes of receptive fields (RF) of the neurons of this region in the left hemisphere is 1.5 larger as in the right one. The RFs of the left hemisphere consist of zones (mainly 5-9) than the RFs of the… (More)
In given work results of researches functional organization of neural networks at associative cortex level in intact and after total corpus callosum section (Cc sec) of cat's brain. In result of the given researches is established, that after total Cc sec the brain is exposed significant morphological and functional changes. Is shown, that Cc sec is… (More)
Spatial-frequency characteristics of receptive field (RF) neurons were studied in the cat area 21. The characteristics differed in different parts of the RFs. The data obtained reveal that the spatial-frequency tuning of RFs as a whole is the result of spatial interaction (algebraic summation) of different tunings of RF's different parts.
21 area's neurons of the visual cortex revealed obvious low-pass frequency characteristics ranging from 0.05 to 3.5 c/deg in cats. Responses of the neurons to different frequencies ranged from 0.05 to 0.89 c/deg in the left hemisphere and from 0.11 to 3.5 c/deg in the right one. The data obtained suggest that the RF's neurons of the area 21 make low-pass… (More)
Sizes of neurons' receptive fields (RFs) were studied in area 21 using as a stimulus the light bar 2.5 x 45 degrees C. The RFs were found to be larger than in areas 17-19 and LS cortex. Means sizes of the RFs were found to be larger in the left hemisphere (45 degrees) as compared with the right one (30 degrees). The whole visual field seems to be formed in… (More)
The interrelationship between the size of receptive fields and the eccentricity in areas 21, 19 and 7 of both hemispheres was studied on immobilized cats. Correlation between the receptive fields size and the eccentricity in area 21 in the both hemispheres was low (R = 0.15; P greater than 0.05). In areas 19 and 7 the correlation of the size fields and… (More)