Macaque V1 neurons can signal 'illusory' contours. Export

@article{citeulike:1743819, abstract = {We describe here a new view of primary visual cortex (V1) based on measurements of neural responses in V1 to patterns called 'illusory contours' (Fig. 1a, b). Detection of an object's boundary contours is a fundamental visual task. Boundary contours are defined by discontinuities not only in luminance and colour, but also in texture, disparity and motion. Two theoretical approaches can account for illusory contour perception. The cognitive approach emphasizes top-down processes. An alternative emphasizes bottom-up processing. This latter view is supported by (1) stimulus constraints for illusory contour perception and (2) the discovery by von der Heydt and Peterhans of neurons in extrastriate visual area V2 (but not in V1) of macaque monkeys that respond to illusory contours. Using stimuli different from those used previously, we found illusory contour responses in about half the neurons studied in V1 of macaque monkeys. Therefore, there are neurons as early as V1 with the computational power to detect illusory contours and to help distinguish figure from ground.}, address = {Center for Neural Science, New York University, New York 10003.}, author = {Grosof, D. H. and Shapley, R. M. and Hawken, M. J.}, citeulike-article-id = {1743819}, citeulike-linkout-0 = {http://dx.doi.org/10.1038/365550a0}, citeulike-linkout-1 = {http://view.ncbi.nlm.nih.gov/pubmed/8413610}, citeulike-linkout-2 = {http://www.hubmed.org/display.cgi?uids=8413610}, day = {7}, doi = {10.1038/365550a0}, issn = {0028-0836}, journal = {Nature}, keywords = {contour-completion, illusory-contours, kanizsa, v1}, month = {October}, number = {6446}, pages = {550--552}, posted-at = {2007-10-09 01:03:13}, priority = {2}, title = {Macaque V1 neurons can signal 'illusory' contours.}, url = {http://dx.doi.org/10.1038/365550a0}, volume = {365}, year = {1993} }

TY - JOUR ID - citeulike:1743819 L3 - citeulike-article-id:1743819 N2 - We describe here a new view of primary visual cortex (V1) based on measurements of neural responses in V1 to patterns called 'illusory contours' (Fig. 1a, b). Detection of an object's boundary contours is a fundamental visual task. Boundary contours are defined by discontinuities not only in luminance and colour, but also in texture, disparity and motion. Two theoretical approaches can account for illusory contour perception. The cognitive approach emphasizes top-down processes. An alternative emphasizes bottom-up processing. This latter view is supported by (1) stimulus constraints for illusory contour perception and (2) the discovery by von der Heydt and Peterhans of neurons in extrastriate visual area V2 (but not in V1) of macaque monkeys that respond to illusory contours. Using stimuli different from those used previously, we found illusory contour responses in about half the neurons studied in V1 of macaque monkeys. Therefore, there are neurons as early as V1 with the computational power to detect illusory contours and to help distinguish figure from ground. IS - 6446 JF - Nature SN - 0028-0836 AD - Center for Neural Science, New York University, New York 10003. EP - 552 TI - Macaque V1 neurons can signal 'illusory' contours. VL - 365 SP - 550 KW - contour-completion KW - illusory-contours KW - kanizsa KW - v1 AU - Grosof, DH AU - Shapley, RM AU - Hawken, MJ PY - 1993/10/07/ UR - http://dx.doi.org/10.1038/365550a0 ER -