[Interrelation among properties of visual cortex neurons in the cat].
In acute experiments on immobilized cats 13 functional characteristics of 96 visual cortex neurons were investigated. Regressional and cluster analyses were used to divide these neurons into two subgroups with different density and degree of connections between characteristics. The receptive fields of cells of the first subgroup were localized relatively centrally in the visual field, those of the second subgroup were localized more often on the periphery. A valuable correlation was found in the half of the studied characteristics. In each subgroup the more centrally localized cells with small receptive fields had relatively shorter latencies, lower thresholds, shorter temporal summation, wider intensity range and greater differential sensitivity; their responses were phasic, with high-frequency discharges. The density of valuable correlation of the characteristics varied from 0.21 to 0.99. The amount of these correlations in the first subgroup was two times higher than in the second one. The possible mechanisms of the correlation between the properties of the visual cortex neurons are discussed, as well as their differences in two subgroups and in the cortex and LGB.
D000818:Animals; D002415:Cats; D005829:Geniculate Bodies / Q000502:physiology; D008905:Minicomputers; D011930:Reaction Time / Q000502:physiology; D012044:Regression Analysis; D012160:Retina / Q000502:physiology; D012684:Sensory Thresholds; D014793:Visual Cortex / Q000166:cytology / Q000502:physiology*; D014794:Visual Fields; D014796:Visual Perception / Q000502:physiology*
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