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• W1982434065 abstract "Visual cortex possesses features such as binocular disparity (DP), ocular dominance (OD), orientation preference (OR), direction preference (DS), and spatial frequency. Neurophysiological studies have explored the existence of orthogonal relationship between local maps of DP and OD at visual cortex sites having vertical/near vertical OR [1]. No experimental studies relate DP map with: (i) OD map at sites other than vertical/near vertical OR, (ii) pinwheel singularities of OR map, and (iii) DS map. We have studied relationship of DP with other features maps such as OR, OD and DS, by jointly developing DP, OR, OD and DS feature maps using Kohonen’s self-organising feature map (SOFM) algorithm. Existing models using Kohenen’s algorithm implements feature maps of visual cortex as: (i) combined OR and OD [2], and (ii) combined OR and DS [3]. No model maps till date have attempted to model DP jointly with OR, OD and DS feature maps of visual cortex. We use VMratio to measure interaction between DP and OD maps. VMratio is peak to baseline value of fitted von Mises function to histogram distribution of gradient direction differences between DP and OD maps. VMratio>3 indicates high interaction and VM-ratio < 2 indicates no interaction [1]. The gradient direction difference at which von Mises function peaks, defines the angle of crossing between DP and OD contours.Indeed in our simulated maps, DP contour crosses OD contour orthogonally having a range from 45° to 135° with median near 90° (VMratio > 3), for vertical/near vertical OR portions/sites. DP contour crosses OD contour having a range from 0° to 45° with median near 22.5° (VMratio > 3), for horizontal/near horizontal OR portions/sites. DP map shows no relationship with: (i) pinwheel singularities of OR map (see Table ​Table1)1) and (ii) DS map. Table 1Statistics of DP vs Pinwheel singularities." @default.
• W1982434065 created "2016-06-24" @default.
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• W1982434065 date "2010-07-01" @default.
• W1982434065 modified "2023-09-26" @default.
• W1982434065 title "Interrelation between binocular disparity and other feature maps of V1 using Kohonen’s SOFM algorithm" @default.
• W1982434065 cites W1988464122 @default.
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• W1982434065 doi "https://doi.org/10.1186/1471-2202-11-s1-p81" @default.
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