Color Signals in the Primate Superior Colliculus

Color Signals in the Primate Superior Colliculus. White, B. J., Boehnke, S. E., Marino, R. A., Itti, L., & Munoz, D. P. In Proc. Vision Science Society Annual Meeting (VSS09), May, 2009.
abstract bibtex

Color is important for segmenting objects from backgrounds, which can in turn facilitate visual search in complex scenes. However, brain areas that control overt visual orienting (i.e., saccadic eye movements) are not believed to have access to color (Schiller et al., 1979), despite massive visual corticotectal projections (Lock et al. 2003), which include areas traditionally associated with color processing (e.g., V4). Here, we show the first evidence that neurons from the intermediate layers of the monkey superior colliculus (SC), a critical structure for both overt and covert visual orienting (Fecteau and Munoz, 2006; Ignashchenkova et al., 2004), can respond to pure chromatic stimuli with the same magnitude as a maximum contrast luminance stimulus. In contrast, neurons from the superficial SC layers showed little color response. Crucially, visual onset latencies were approximately 30ms longer for color, implying that luminance and chrominance information reach the SC through distinct pathways, and that the color response can- not be due to residual luminance signals. Furthermore, these differences in visual latency translated directly into differences in saccadic reaction time (SRT) between color and luminance, which closely match SRT differences reported in humans (White et al., 2006). These results demonstrate that the saccadic eye movement system can signal the presence of pure chromatic stimuli only one stage from the brainstem premotor circuitry that drives the eyes. Acknowledgement: The authors thank Ann Lablans, Becky Cranham, Donald Brien, Sean Hickman and Mike Lewis and for technical assistance. This project was funded by the Human Frontiers Science Program, Grant RGP0039-2005-C, and the Canadian Institutes of Health Research. DPM was supported by Canada Research Chair Program.

@inproceedings{ White_etal09vss,
  author = {B. J. White and S. E. Boehnke and R. A. Marino and L. Itti and D. P. Munoz},
  title = {Color Signals in the Primate Superior Colliculus},
  abstract = {Color is important for segmenting objects from backgrounds, which can in turn facilitate visual search in
                  complex scenes. However, brain areas that control overt visual orienting (i.e., saccadic eye
                  movements) are not believed to have access to color (Schiller et al., 1979), despite massive visual
                  corticotectal projections (Lock et al. 2003), which include areas traditionally associated with color
                  processing (e.g., V4). Here, we show the first evidence that neurons from the intermediate layers of
                  the monkey superior colliculus (SC), a critical structure for both overt and covert visual orienting
                  (Fecteau and Munoz, 2006; Ignashchenkova et al., 2004), can respond to pure chromatic stimuli with the
                  same magnitude as a maximum contrast luminance stimulus. In contrast, neurons from the superficial SC
                  layers showed little color response. Crucially, visual onset latencies were approximately 30ms longer
                  for color, implying that luminance and chrominance information reach the SC through distinct pathways,
                  and that the color response can- not be due to residual luminance signals. Furthermore, these
                  differences in visual latency translated directly into differences in saccadic reaction time (SRT)
                  between color and luminance, which closely match SRT differences reported in humans (White et al.,
                  2006). These results demonstrate that the saccadic eye movement system can signal the presence of pure
                  chromatic stimuli only one stage from the brainstem premotor circuitry that drives the eyes.
                  Acknowledgement: The authors thank Ann Lablans, Becky Cranham, Donald Brien, Sean Hickman and Mike
                  Lewis and for technical assistance. This project was funded by the Human Frontiers Science Program,
                  Grant RGP0039-2005-C, and the Canadian Institutes of Health Research. DPM was supported by Canada
                  Research Chair Program.},
  booktitle = {Proc. Vision Science Society Annual Meeting (VSS09)},
  year = {2009},
  month = {May},
  type = {phy},
  review = {abs/conf}
}

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{"_id":{"_str":"5298a1a19eb585cc260008d7"},"__v":0,"authorIDs":[],"author_short":["White, B.<nbsp>J.","Boehnke, S.<nbsp>E.","Marino, R.<nbsp>A.","Itti, L.","Munoz, D.<nbsp>P."],"bibbaseid":"white-boehnke-marino-itti-munoz-colorsignalsintheprimatesuperiorcolliculus-2009","bibdata":{"html":"<div class=\"bibbase_paper\"> \n\n\n<span class=\"bibbase_paper_titleauthoryear\">\n\t<span class=\"bibbase_paper_title\"><a name=\"White_etal09vss\"> </a>Color Signals in the Primate Superior Colliculus.</span>\n\t<span class=\"bibbase_paper_author\">\nWhite, B. J.; Boehnke, S. E.; Marino, R. A.; Itti, L.; and Munoz, D. P.</span>\n\t\n</span>\n\n\n\nIn\n<i>Proc. Vision Science Society Annual Meeting (VSS09)</i>, May 2009.\n\n\n\n\n\n<br class=\"bibbase_paper_content\"/>\n\n<span class=\"bibbase_paper_content\">\n \n \n \n <a href=\"javascript:showBib('White_etal09vss')\"\n class=\"bibbase link\">\n \n\t\n\t\n\t\n BibTeX\n <i class=\"fa fa-caret-down\"></i></a>\n \n \n  \n <a class=\"bibbase_abstract_link bibbase link\"\n href=\"javascript:showAbstract('White_etal09vss')\">\n Abstract\n <i class=\"fa fa-caret-down\"></i></a>\n \n \n \n\n \n \n \n</span>\n\n<div class=\"well well-small bibbase\" id=\"bib_White_etal09vss\"\n style=\"display:none\">\n <pre>@inproceedings{ White_etal09vss,\n author = {B. J. White and S. E. Boehnke and R. A. Marino and L. Itti and D. P. Munoz},\n title = {Color Signals in the Primate Superior Colliculus},\n abstract = {Color is important for segmenting objects from backgrounds, which can in turn facilitate visual search in\n complex scenes. However, brain areas that control overt visual orienting (i.e., saccadic eye\n movements) are not believed to have access to color (Schiller et al., 1979), despite massive visual\n corticotectal projections (Lock et al. 2003), which include areas traditionally associated with color\n processing (e.g., V4). Here, we show the first evidence that neurons from the intermediate layers of\n the monkey superior colliculus (SC), a critical structure for both overt and covert visual orienting\n (Fecteau and Munoz, 2006; Ignashchenkova et al., 2004), can respond to pure chromatic stimuli with the\n same magnitude as a maximum contrast luminance stimulus. In contrast, neurons from the superficial SC\n layers showed little color response. Crucially, visual onset latencies were approximately 30ms longer\n for color, implying that luminance and chrominance information reach the SC through distinct pathways,\n and that the color response can- not be due to residual luminance signals. Furthermore, these\n differences in visual latency translated directly into differences in saccadic reaction time (SRT)\n between color and luminance, which closely match SRT differences reported in humans (White et al.,\n 2006). These results demonstrate that the saccadic eye movement system can signal the presence of pure\n chromatic stimuli only one stage from the brainstem premotor circuitry that drives the eyes.\n Acknowledgement: The authors thank Ann Lablans, Becky Cranham, Donald Brien, Sean Hickman and Mike\n Lewis and for technical assistance. This project was funded by the Human Frontiers Science Program,\n Grant RGP0039-2005-C, and the Canadian Institutes of Health Research. DPM was supported by Canada\n Research Chair Program.},\n booktitle = {Proc. Vision Science Society Annual Meeting (VSS09)},\n year = {2009},\n month = {May},\n type = {phy},\n review = {abs/conf}\n}</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" id=\"abstract_White_etal09vss\"\n style=\"display:none\">\n Color is important for segmenting objects from backgrounds, which can in turn facilitate visual search in complex scenes. However, brain areas that control overt visual orienting (i.e., saccadic eye movements) are not believed to have access to color (Schiller et al., 1979), despite massive visual corticotectal projections (Lock et al. 2003), which include areas traditionally associated with color processing (e.g., V4). Here, we show the first evidence that neurons from the intermediate layers of the monkey superior colliculus (SC), a critical structure for both overt and covert visual orienting (Fecteau and Munoz, 2006; Ignashchenkova et al., 2004), can respond to pure chromatic stimuli with the same magnitude as a maximum contrast luminance stimulus. In contrast, neurons from the superficial SC layers showed little color response. Crucially, visual onset latencies were approximately 30ms longer for color, implying that luminance and chrominance information reach the SC through distinct pathways, and that the color response can- not be due to residual luminance signals. Furthermore, these differences in visual latency translated directly into differences in saccadic reaction time (SRT) between color and luminance, which closely match SRT differences reported in humans (White et al., 2006). These results demonstrate that the saccadic eye movement system can signal the presence of pure chromatic stimuli only one stage from the brainstem premotor circuitry that drives the eyes. Acknowledgement: The authors thank Ann Lablans, Becky Cranham, Donald Brien, Sean Hickman and Mike Lewis and for technical assistance. This project was funded by the Human Frontiers Science Program, Grant RGP0039-2005-C, and the Canadian Institutes of Health Research. DPM was supported by Canada Research Chair Program.\n</div>\n\n\n</div>\n","downloads":0,"bibbaseid":"white-boehnke-marino-itti-munoz-colorsignalsintheprimatesuperiorcolliculus-2009","role":"author","year":"2009","type":"phy","title":"Color Signals in the Primate Superior Colliculus","review":"abs/conf","month":"May","key":"White_etal09vss","id":"White_etal09vss","booktitle":"Proc. Vision Science Society Annual Meeting (VSS09)","bibtype":"inproceedings","bibtex":"@inproceedings{ White_etal09vss,\n author = {B. J. White and S. E. Boehnke and R. A. Marino and L. Itti and D. P. Munoz},\n title = {Color Signals in the Primate Superior Colliculus},\n abstract = {Color is important for segmenting objects from backgrounds, which can in turn facilitate visual search in\n complex scenes. However, brain areas that control overt visual orienting (i.e., saccadic eye\n movements) are not believed to have access to color (Schiller et al., 1979), despite massive visual\n corticotectal projections (Lock et al. 2003), which include areas traditionally associated with color\n processing (e.g., V4). Here, we show the first evidence that neurons from the intermediate layers of\n the monkey superior colliculus (SC), a critical structure for both overt and covert visual orienting\n (Fecteau and Munoz, 2006; Ignashchenkova et al., 2004), can respond to pure chromatic stimuli with the\n same magnitude as a maximum contrast luminance stimulus. In contrast, neurons from the superficial SC\n layers showed little color response. Crucially, visual onset latencies were approximately 30ms longer\n for color, implying that luminance and chrominance information reach the SC through distinct pathways,\n and that the color response can- not be due to residual luminance signals. Furthermore, these\n differences in visual latency translated directly into differences in saccadic reaction time (SRT)\n between color and luminance, which closely match SRT differences reported in humans (White et al.,\n 2006). These results demonstrate that the saccadic eye movement system can signal the presence of pure\n chromatic stimuli only one stage from the brainstem premotor circuitry that drives the eyes.\n Acknowledgement: The authors thank Ann Lablans, Becky Cranham, Donald Brien, Sean Hickman and Mike\n Lewis and for technical assistance. This project was funded by the Human Frontiers Science Program,\n Grant RGP0039-2005-C, and the Canadian Institutes of Health Research. DPM was supported by Canada\n Research Chair Program.},\n booktitle = {Proc. Vision Science Society Annual Meeting (VSS09)},\n year = {2009},\n month = {May},\n type = {phy},\n review = {abs/conf}\n}","author_short":["White, B.<nbsp>J.","Boehnke, S.<nbsp>E.","Marino, R.<nbsp>A.","Itti, L.","Munoz, D.<nbsp>P."],"author":["White, B. J.","Boehnke, S. E.","Marino, R. A.","Itti, L.","Munoz, D. P."],"abstract":"Color is important for segmenting objects from backgrounds, which can in turn facilitate visual search in complex scenes. However, brain areas that control overt visual orienting (i.e., saccadic eye movements) are not believed to have access to color (Schiller et al., 1979), despite massive visual corticotectal projections (Lock et al. 2003), which include areas traditionally associated with color processing (e.g., V4). Here, we show the first evidence that neurons from the intermediate layers of the monkey superior colliculus (SC), a critical structure for both overt and covert visual orienting (Fecteau and Munoz, 2006; Ignashchenkova et al., 2004), can respond to pure chromatic stimuli with the same magnitude as a maximum contrast luminance stimulus. In contrast, neurons from the superficial SC layers showed little color response. Crucially, visual onset latencies were approximately 30ms longer for color, implying that luminance and chrominance information reach the SC through distinct pathways, and that the color response can- not be due to residual luminance signals. Furthermore, these differences in visual latency translated directly into differences in saccadic reaction time (SRT) between color and luminance, which closely match SRT differences reported in humans (White et al., 2006). These results demonstrate that the saccadic eye movement system can signal the presence of pure chromatic stimuli only one stage from the brainstem premotor circuitry that drives the eyes. Acknowledgement: The authors thank Ann Lablans, Becky Cranham, Donald Brien, Sean Hickman and Mike Lewis and for technical assistance. This project was funded by the Human Frontiers Science Program, Grant RGP0039-2005-C, and the Canadian Institutes of Health Research. DPM was supported by Canada Research Chair Program."},"bibtype":"inproceedings","biburl":"http://ilab.usc.edu/publications/src/ilab.bib","downloads":0,"search_terms":["color","signals","primate","superior","colliculus","white","boehnke","marino","itti","munoz"],"title":"Color Signals in the Primate Superior Colliculus","year":2009,"dataSources":["wedBDxEpNXNCLZ2sZ"]}