Theory of orientation tuning in visual cortex. Export

@article{citeulike:1447547, abstract = {The role of intrinsic cortical connections in processing sensory input and in generating behavioral output is poorly understood. We have examined this issue in the context of the tuning of neuronal responses in cortex to the orientation of a visual stimulus. We analytically study a simple network model that incorporates both orientation-selective input from the lateral geniculate nucleus and orientation-specific cortical interactions. Depending on the model parameters, the network exhibits orientation selectivity that originates from within the cortex, by a symmetry-breaking mechanism. In this case, the width of the orientation tuning can be sharp even if the lateral geniculate nucleus inputs are only weakly anisotropic. By using our model, several experimental consequences of this cortical mechanism of orientation tuning are derived. The tuning width is relatively independent of the contrast and angular anisotropy of the visual stimulus. The transient population response to changing of the stimulus orientation exhibits a slow "virtual rotation." Neuronal cross-correlations exhibit long time tails, the sign of which depends on the preferred orientations of the cells and the stimulus orientation.}, address = {Racah Institute of Physics, Hebrew University, Jerusalem, Israel.}, author = {Ben-Yishai, R. and Bar-Or, R. L. and Sompolinsky, H.}, citeulike-article-id = {1447547}, citeulike-linkout-0 = {http://www.pnas.org/content/92/9/3844.abstract}, citeulike-linkout-1 = {http://www.pnas.org/content/92/9/3844.full.pdf}, citeulike-linkout-2 = {http://view.ncbi.nlm.nih.gov/pubmed/7731993}, citeulike-linkout-3 = {http://www.hubmed.org/display.cgi?uids=7731993}, day = {25}, issn = {0027-8424}, journal = {Proceedings of the National Academy of Sciences of the United States of America}, keywords = {bump, cortex, neural\_field, orientation, orientation\_selectivity}, month = {April}, number = {9}, pages = {3844--3848}, posted-at = {2009-09-21 13:01:51}, priority = {2}, title = {Theory of orientation tuning in visual cortex.}, url = {http://www.pnas.org/content/92/9/3844.abstract}, volume = {92}, year = {1995} }

TY - JOUR ID - citeulike:1447547 L3 - citeulike-article-id:1447547 N2 - The role of intrinsic cortical connections in processing sensory input and in generating behavioral output is poorly understood. We have examined this issue in the context of the tuning of neuronal responses in cortex to the orientation of a visual stimulus. We analytically study a simple network model that incorporates both orientation-selective input from the lateral geniculate nucleus and orientation-specific cortical interactions. Depending on the model parameters, the network exhibits orientation selectivity that originates from within the cortex, by a symmetry-breaking mechanism. In this case, the width of the orientation tuning can be sharp even if the lateral geniculate nucleus inputs are only weakly anisotropic. By using our model, several experimental consequences of this cortical mechanism of orientation tuning are derived. The tuning width is relatively independent of the contrast and angular anisotropy of the visual stimulus. The transient population response to changing of the stimulus orientation exhibits a slow "virtual rotation." Neuronal cross-correlations exhibit long time tails, the sign of which depends on the preferred orientations of the cells and the stimulus orientation. IS - 9 JF - Proceedings of the National Academy of Sciences of the United States of America SN - 0027-8424 AD - Racah Institute of Physics, Hebrew University, Jerusalem, Israel. EP - 3848 TI - Theory of orientation tuning in visual cortex. VL - 92 SP - 3844 KW - bump KW - cortex KW - neural_field KW - orientation KW - orientation_selectivity AU - Ben-Yishai, R AU - Bar-Or, RL AU - Sompolinsky, H PY - 1995/04/25/ UR - http://www.pnas.org/content/92/9/3844.abstract ER -