Color-related Signals in the Primate Superior Colliculus

Color-related Signals in the Primate Superior Colliculus. White, B. J., Boehnke, S. E., Marino, R. A., Itti, L., & Munoz, D. P. Journal of Neuroscience, 29(39):12159-12166, Sep, 2009.
abstract bibtex

Color is important for segmenting objects from backgrounds, which can in turn facilitate visual search in complex scenes. However, brain areas involved in orienting the eyes toward colored stimuli in our environment are not believed to have access to color information. Here, we show that neurons in the intermediate layers of the monkey superior colliculus (SC), a critical structure for the production of saccadic eye movements, can respond to isoluminant color stimuli with the same magnitude as a maximum contrast luminance stimulus. In contrast, neurons from the superficial SC layers showed little color-related activity. Crucially, visual onset latencies were 30-35ms longer for color, implying that luminance and chrominance information reach the SC through distinct pathways and that the observed colorrelated activity is not the result of residual luminance signals. Furthermore, these differences in visual onset latency translated directly into differences in saccadic reaction time. The results demonstrate that the saccadic system can signal the presence of chromatic stimuli only one stage from the brainstem premotor circuitry that drives the eyes.

@article{ White_etal09jn,
  author = {B. J. White and S. E. Boehnke and R. A. Marino and L. Itti and D. P. Munoz},
  title = {Color-related 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 involved in
                  orienting the eyes toward colored stimuli in our
                  environment are not believed to have access to color
                  information. Here, we show that neurons in the
                  intermediate layers of the monkey superior
                  colliculus (SC), a critical structure for the
                  production of saccadic eye movements, can respond to
                  isoluminant color stimuli with the same magnitude as
                  a maximum contrast luminance stimulus. In contrast,
                  neurons from the superficial SC layers showed little
                  color-related activity. Crucially, visual onset
                  latencies were 30-35ms longer for color, implying
                  that luminance and chrominance information reach the
                  SC through distinct pathways and that the observed
                  colorrelated activity is not the result of residual
                  luminance signals. Furthermore, these differences in
                  visual onset latency translated directly into
                  differences in saccadic reaction time. The results
                  demonstrate that the saccadic system can signal the
                  presence of chromatic stimuli only one stage from
                  the brainstem premotor circuitry that drives the
                  eyes.},
  journal = {Journal of Neuroscience},
  year = {2009},
  month = {Sep},
  volume = {29},
  number = {39},
  pages = {12159-12166},
  if = {2008 Impact Factor: 7.452},
  file = {http://ilab.usc.edu/publications/doc/White_etal09jn.pdf},
  type = {phy;psy}
}

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J. White and S. E. Boehnke and R. A. Marino and L. Itti and D. P. Munoz},\n title = {Color-related Signals in the Primate Superior Colliculus},\n abstract = {Color is important for segmenting objects from backgrounds,\n which can in turn facilitate visual search in\n complex scenes. However, brain areas involved in\n orienting the eyes toward colored stimuli in our\n environment are not believed to have access to color\n information. Here, we show that neurons in the\n intermediate layers of the monkey superior\n colliculus (SC), a critical structure for the\n production of saccadic eye movements, can respond to\n isoluminant color stimuli with the same magnitude as\n a maximum contrast luminance stimulus. In contrast,\n neurons from the superficial SC layers showed little\n color-related activity. Crucially, visual onset\n latencies were 30-35ms longer for color, implying\n that luminance and chrominance information reach the\n SC through distinct pathways and that the observed\n colorrelated activity is not the result of residual\n luminance signals. Furthermore, these differences in\n visual onset latency translated directly into\n differences in saccadic reaction time. The results\n demonstrate that the saccadic system can signal the\n presence of chromatic stimuli only one stage from\n the brainstem premotor circuitry that drives the\n eyes.},\n journal = {Journal of Neuroscience},\n year = {2009},\n month = {Sep},\n volume = {29},\n number = {39},\n pages = {12159-12166},\n if = {2008 Impact Factor: 7.452},\n file = {http://ilab.usc.edu/publications/doc/White_etal09jn.pdf},\n type = {phy;psy}\n}</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" id=\"abstract_White_etal09jn\"\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 involved in orienting the eyes toward colored stimuli in our environment are not believed to have access to color information. Here, we show that neurons in the intermediate layers of the monkey superior colliculus (SC), a critical structure for the production of saccadic eye movements, can respond to isoluminant color stimuli with the same magnitude as a maximum contrast luminance stimulus. In contrast, neurons from the superficial SC layers showed little color-related activity. Crucially, visual onset latencies were 30-35ms longer for color, implying that luminance and chrominance information reach the SC through distinct pathways and that the observed colorrelated activity is not the result of residual luminance signals. Furthermore, these differences in visual onset latency translated directly into differences in saccadic reaction time. The results demonstrate that the saccadic system can signal the presence of chromatic stimuli only one stage from the brainstem premotor circuitry that drives the eyes.\n</div>\n\n\n</div>\n","downloads":0,"bibbaseid":"white-boehnke-marino-itti-munoz-colorrelatedsignalsintheprimatesuperiorcolliculus-2009","role":"author","year":"2009","volume":"29","type":"phy;psy","title":"Color-related Signals in the Primate Superior Colliculus","pages":"12159-12166","number":"39","month":"Sep","key":"White_etal09jn","journal":"Journal of Neuroscience","if":"2008 Impact Factor: 7.452","id":"White_etal09jn","file":"http://ilab.usc.edu/publications/doc/White_etal09jn.pdf","bibtype":"article","bibtex":"@article{ White_etal09jn,\n author = {B. J. White and S. E. Boehnke and R. A. Marino and L. Itti and D. P. Munoz},\n title = {Color-related Signals in the Primate Superior Colliculus},\n abstract = {Color is important for segmenting objects from backgrounds,\n which can in turn facilitate visual search in\n complex scenes. However, brain areas involved in\n orienting the eyes toward colored stimuli in our\n environment are not believed to have access to color\n information. Here, we show that neurons in the\n intermediate layers of the monkey superior\n colliculus (SC), a critical structure for the\n production of saccadic eye movements, can respond to\n isoluminant color stimuli with the same magnitude as\n a maximum contrast luminance stimulus. In contrast,\n neurons from the superficial SC layers showed little\n color-related activity. Crucially, visual onset\n latencies were 30-35ms longer for color, implying\n that luminance and chrominance information reach the\n SC through distinct pathways and that the observed\n colorrelated activity is not the result of residual\n luminance signals. Furthermore, these differences in\n visual onset latency translated directly into\n differences in saccadic reaction time. The results\n demonstrate that the saccadic system can signal the\n presence of chromatic stimuli only one stage from\n the brainstem premotor circuitry that drives the\n eyes.},\n journal = {Journal of Neuroscience},\n year = {2009},\n month = {Sep},\n volume = {29},\n number = {39},\n pages = {12159-12166},\n if = {2008 Impact Factor: 7.452},\n file = {http://ilab.usc.edu/publications/doc/White_etal09jn.pdf},\n type = {phy;psy}\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. 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Furthermore, these differences in visual onset latency translated directly into differences in saccadic reaction time. The results demonstrate that the saccadic system can signal the presence of chromatic stimuli only one stage from the brainstem premotor circuitry that drives the eyes."},"bibtype":"article","biburl":"http://ilab.usc.edu/publications/src/ilab.bib","downloads":0,"search_terms":["color","related","signals","primate","superior","colliculus","white","boehnke","marino","itti","munoz"],"title":"Color-related Signals in the Primate Superior Colliculus","year":2009,"dataSources":["wedBDxEpNXNCLZ2sZ"]}