Spatial heterogeneity of inhibitory surrounds in the middle temporal visual area.

@article{citeulike:2799089, abstract = {A recurrent theme in the organization of vertebrate visual cortex is that of receptive fields with an associated "silent" opponency component. In the middle temporal area (area MT), a cortical visual area involved in the analysis of retinal motion in primates, this opponency appears in the form of a region outside the classical receptive field (CRF) that in itself gives no response but suppresses responses to motion evoked within the CRF. This antagonistic motion surround has been described as very large and symmetrically arrayed around the CRF. On the basis of this view, the primary function of the surround has long been thought to consist of simple figure-ground segregation based on movement. We have made use of small stimulus patches to map the form and extent of the surround and find evidence that the surround inhibition of many MT cells is in fact confined to restricted regions on one side or on opposite sides of the CRF. Such regions endow MT cells with the ability to make local-to-local motion comparisons, capable of extracting more complex features from the visual environment, and as such, may be better viewed as intrinsic parts of the receptive field, rather than as separate entities responsible for local-to-global comparisons.}, address = {Laboratorium voor Neuro- en Psychofysiologie, Katholieke Universiteit Leuven, School of Medicine, Belgium.}, author = {Xiao, D. K. and Raiguel, S. and Marcar, V. and Koenderink, J. and Orban, G. A. }, citeulike-article-id = {2799089}, issn = {0027-8424}, journal = {Proceedings of the National Academy of Sciences of the United States of America}, keywords = {center-surround, motion-contrast, mt, physiology}, month = {November}, number = {24}, pages = {11303--11306}, posted-at = {2008-05-14 15:50:23}, priority = {2}, title = {Spatial heterogeneity of inhibitory surrounds in the middle temporal visual area.}, url = {http://view.ncbi.nlm.nih.gov/pubmed/7479984}, volume = {92}, year = {1995} }

TY - JOUR ID - citeulike:2799089 L3 - citeulike-article-id:2799089 TI - Spatial heterogeneity of inhibitory surrounds in the middle temporal visual area. JF - Proceedings of the National Academy of Sciences of the United States of America VL - 92 IS - 24 SP - 11303 EP - 11306 AD - Laboratorium voor Neuro- en Psychofysiologie, Katholieke Universiteit Leuven, School of Medicine, Belgium. SN - 0027-8424 N2 - A recurrent theme in the organization of vertebrate visual cortex is that of receptive fields with an associated "silent" opponency component. In the middle temporal area (area MT), a cortical visual area involved in the analysis of retinal motion in primates, this opponency appears in the form of a region outside the classical receptive field (CRF) that in itself gives no response but suppresses responses to motion evoked within the CRF. This antagonistic motion surround has been described as very large and symmetrically arrayed around the CRF. On the basis of this view, the primary function of the surround has long been thought to consist of simple figure-ground segregation based on movement. We have made use of small stimulus patches to map the form and extent of the surround and find evidence that the surround inhibition of many MT cells is in fact confined to restricted regions on one side or on opposite sides of the CRF. Such regions endow MT cells with the ability to make local-to-local motion comparisons, capable of extracting more complex features from the visual environment, and as such, may be better viewed as intrinsic parts of the receptive field, rather than as separate entities responsible for local-to-global comparisons. KW - center-surround KW - motion-contrast KW - mt KW - physiology AU - Xiao, DK AU - Raiguel, S AU - Marcar, V AU - Koenderink, J AU - Orban, GA PY - 1995/11/21/ UR - http://view.ncbi.nlm.nih.gov/pubmed/7479984 ER -