Receptive Fields of Bar and Cross-Shaped Figure Detectors in Classical and Combined Mapping

Connections between the excitatory and inhibitory zones of the receptive fields of neurons sensitive to the orientations of single bars and cross-shaped figures in the primary visual cortex were studied by classical and combined mapping. Factor and correlation analysis revealed different relationshi...

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Bibliographic Details
Published in:Neuroscience and behavioral physiology 2011-10, Vol.41 (9), p.942-950
Main Authors: Saltykov, K. A., Lazareva, N. A., Kulikov, M. A., Novikova, R. V., Tikhomirov, A. S., Tsutskiridze, D. Yu, Shevelev, I. A.
Format: Article
Language:English
Subjects:
Behavioral Sciences
Biomedical and Life Sciences
Biomedicine
Brain mapping
Correlation analysis
Cortex (visual)
Factor analysis
Nervous system
Neurobiology
Neurons
Neurosciences
Orientation
Receptive field
Sensors
Topography
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Summary:Connections between the excitatory and inhibitory zones of the receptive fields of neurons sensitive to the orientations of single bars and cross-shaped figures in the primary visual cortex were studied by classical and combined mapping. Factor and correlation analysis revealed different relationships between the main characteristics of neurons and their receptive fields for bar and cross detectors. Factor analysis of these connections showed that variables with the greatest weightings, combined into a single factor, were different for different detectors. In bar detectors, there was a direct correlational relationship between background activity and the weighting characteristics of the excitatory and inhibitory zones of their receptive fields. In cross-shaped figure detectors, the indexes of inhibition were positively related to the index of sensitivity to the figure, the characteristics of the excitatory zones of the receptive field, and background activity. In these detectors, increases in the area and weighting of additional receptive field excitatory zones in combined mapping were significantly greater than in bar detectors. The question of the difference in the mechanisms forming the receptive fields of bar and cross-shaped figure detectors, for which direct and recurrent horizontal inhibitory connections with surrounding neurons are more important, is discussed.
ISSN:0097-0549
1573-899X
DOI:10.1007/s11055-011-9513-7