Investigation of spontaneous saccades based on the saliency model in monkeys with unilateral lesion of primary visual cortex. Itti, L., Yoshida, M., Berg, D. J., Ikeda, T., Kato, R., Takaura, K., & Isa, T. In Proc. Vision Science Society Annual Meeting (VSS07), May, 2007. abstract bibtex Primary visual cortex (area V1) is the entry point of visual processing into the primate cortex. Yet, human and animal studies of V1 lesions have demonstrated a "blindsight" phenomenon, whereby residual visually-guided behavior remains even when large portions of V1 are absent. However, little is known quantitatively of how this residual vision (possibly subcortically-mediated) differs from normal (cortically-mediated) vision. We analyzed eye movements of three macaque monkeys (one normal, two with complete unilateral V1 ablation) watching ~54 minutes of television (97,051 video frames). A computational model of bottom-up attention quantified how salient visual features may guide gaze into the normal vs. the lesioned hemifield. To eliminate stimulus biases, we randomly presented all video clips twice, original and horizontally flipped. We quantified the extent to which salient stimuli attracted gaze of each monkey by computing, for saccades tallied along the eight principal directions, a model-based bottom-up guidance score (chance level 0.5; ideal upper bound 1.0; practical inter-observer score previously measured as the extent to which three control monkeys predict gaze of a fourth monkey ~0.6). For the normal as well as both lesioned monkeys, we found that saccades in all eight principal directions were guided towards salient locations, significantly above chance (scores 0.585+/-0.006 to 0.662+/-0.004, t-tests p<0.00003, 909 to 3,537 saccades per monkey in each direction). However, although lesioned monkeys overall scored lower, there was little difference in bottom-up guidance with saccade direction (scores 2.2 percent to 3.6 percent lower for saccades directed into vs. away from the lesioned hemifield). Our preliminary results suggest that the extent to which monkey saccades are attracted towards salient locations during natural vision may be less affected by the absence of primary visual cortex than previously considered.
@inproceedings{ Itti_etal07vss,
author = {L. Itti and M. Yoshida and D. J. Berg and T. Ikeda and R. Kato
and K. Takaura and T. Isa},
title = {Investigation of spontaneous saccades based on the saliency
model in monkeys with unilateral lesion of primary
visual cortex},
abstract = {Primary visual cortex (area V1) is the entry point of visual
processing into the primate cortex. Yet, human and
animal studies of V1 lesions have demonstrated a
"blindsight" phenomenon, whereby residual
visually-guided behavior remains even when large
portions of V1 are absent. However, little is known
quantitatively of how this residual vision (possibly
subcortically-mediated) differs from normal
(cortically-mediated) vision. We analyzed eye
movements of three macaque monkeys (one normal, two
with complete unilateral V1 ablation) watching ~54
minutes of television (97,051 video frames). A
computational model of bottom-up attention
quantified how salient visual features may guide
gaze into the normal vs. the lesioned hemifield. To
eliminate stimulus biases, we randomly presented all
video clips twice, original and horizontally
flipped. We quantified the extent to which salient
stimuli attracted gaze of each monkey by computing,
for saccades tallied along the eight principal
directions, a model-based bottom-up guidance score
(chance level 0.5; ideal upper bound 1.0; practical
inter-observer score previously measured as the
extent to which three control monkeys predict gaze
of a fourth monkey ~0.6). For the normal as well as
both lesioned monkeys, we found that saccades in all
eight principal directions were guided towards
salient locations, significantly above chance
(scores 0.585+/-0.006 to 0.662+/-0.004, t-tests
p<0.00003, 909 to 3,537 saccades per monkey in each
direction). However, although lesioned monkeys
overall scored lower, there was little difference in
bottom-up guidance with saccade direction (scores
2.2 percent to 3.6 percent lower for saccades
directed into vs. away from the lesioned hemifield).
Our preliminary results suggest that the extent to
which monkey saccades are attracted towards salient
locations during natural vision may be less affected
by the absence of primary visual cortex than
previously considered.},
booktitle = {Proc. Vision Science Society Annual Meeting (VSS07)},
year = {2007},
month = {May},
type = {mod;su;eye;bu},
review = {abs/conf}
}
Downloads: 0
{"_id":{"_str":"5298a1a09eb585cc2600088e"},"__v":0,"authorIDs":[],"author_short":["Itti, L.","Yoshida, M.","Berg, D.<nbsp>J.","Ikeda, T.","Kato, R.","Takaura, K.","Isa, T."],"bibbaseid":"itti-yoshida-berg-ikeda-kato-takaura-isa-investigationofspontaneoussaccadesbasedonthesaliencymodelinmonkeyswithunilaterallesionofprimaryvisualcortex-2007","bibdata":{"html":"<div class=\"bibbase_paper\"> \n\n\n<span class=\"bibbase_paper_titleauthoryear\">\n\t<span class=\"bibbase_paper_title\"><a name=\"Itti_etal07vss\"> </a>Investigation of spontaneous saccades based on the saliency model in monkeys with unilateral lesion of primary visual cortex.</span>\n\t<span class=\"bibbase_paper_author\">\nItti, L.; Yoshida, M.; Berg, D. J.; Ikeda, T.; Kato, R.; Takaura, K.; and Isa, T.</span>\n\t<!-- <span class=\"bibbase_paper_year\">2007</span>. -->\n</span>\n\n\n\nIn\n<i>Proc. Vision Science Society Annual Meeting (VSS07)</i>, May 2007.\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('Itti_etal07vss')\"\n class=\"bibbase link\">\n <!-- <img src=\"http://www.bibbase.org/img/filetypes/bib.png\" -->\n\t<!-- alt=\"Investigation of spontaneous saccades based on the saliency model in monkeys with unilateral lesion of primary visual cortex [bib]\" -->\n\t<!-- class=\"bibbase_icon\" -->\n\t<!-- style=\"width: 24px; height: 24px; border: 0px; vertical-align: text-top\"><span class=\"bibbase_icon_text\">Bibtex</span> -->\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('Itti_etal07vss')\">\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_Itti_etal07vss\"\n style=\"display:none\">\n <pre>@inproceedings{ Itti_etal07vss,\n author = {L. Itti and M. Yoshida and D. J. Berg and T. Ikeda and R. Kato\n and K. Takaura and T. Isa},\n title = {Investigation of spontaneous saccades based on the saliency\n model in monkeys with unilateral lesion of primary\n visual cortex},\n abstract = {Primary visual cortex (area V1) is the entry point of visual\n processing into the primate cortex. Yet, human and\n animal studies of V1 lesions have demonstrated a\n \"blindsight\" phenomenon, whereby residual\n visually-guided behavior remains even when large\n portions of V1 are absent. However, little is known\n quantitatively of how this residual vision (possibly\n subcortically-mediated) differs from normal\n (cortically-mediated) vision. We analyzed eye\n movements of three macaque monkeys (one normal, two\n with complete unilateral V1 ablation) watching ~54\n minutes of television (97,051 video frames). A\n computational model of bottom-up attention\n quantified how salient visual features may guide\n gaze into the normal vs. the lesioned hemifield. To\n eliminate stimulus biases, we randomly presented all\n video clips twice, original and horizontally\n flipped. We quantified the extent to which salient\n stimuli attracted gaze of each monkey by computing,\n for saccades tallied along the eight principal\n directions, a model-based bottom-up guidance score\n (chance level 0.5; ideal upper bound 1.0; practical\n inter-observer score previously measured as the\n extent to which three control monkeys predict gaze\n of a fourth monkey ~0.6). For the normal as well as\n both lesioned monkeys, we found that saccades in all\n eight principal directions were guided towards\n salient locations, significantly above chance\n (scores 0.585+/-0.006 to 0.662+/-0.004, t-tests\n p<0.00003, 909 to 3,537 saccades per monkey in each\n direction). However, although lesioned monkeys\n overall scored lower, there was little difference in\n bottom-up guidance with saccade direction (scores\n 2.2 percent to 3.6 percent lower for saccades\n directed into vs. away from the lesioned hemifield).\n Our preliminary results suggest that the extent to\n which monkey saccades are attracted towards salient\n locations during natural vision may be less affected\n by the absence of primary visual cortex than\n previously considered.},\n booktitle = {Proc. Vision Science Society Annual Meeting (VSS07)},\n year = {2007},\n month = {May},\n type = {mod;su;eye;bu},\n review = {abs/conf}\n}</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" id=\"abstract_Itti_etal07vss\"\n style=\"display:none\">\n Primary visual cortex (area V1) is the entry point of visual processing into the primate cortex. Yet, human and animal studies of V1 lesions have demonstrated a \"blindsight\" phenomenon, whereby residual visually-guided behavior remains even when large portions of V1 are absent. However, little is known quantitatively of how this residual vision (possibly subcortically-mediated) differs from normal (cortically-mediated) vision. We analyzed eye movements of three macaque monkeys (one normal, two with complete unilateral V1 ablation) watching ~54 minutes of television (97,051 video frames). A computational model of bottom-up attention quantified how salient visual features may guide gaze into the normal vs. the lesioned hemifield. To eliminate stimulus biases, we randomly presented all video clips twice, original and horizontally flipped. We quantified the extent to which salient stimuli attracted gaze of each monkey by computing, for saccades tallied along the eight principal directions, a model-based bottom-up guidance score (chance level 0.5; ideal upper bound 1.0; practical inter-observer score previously measured as the extent to which three control monkeys predict gaze of a fourth monkey ~0.6). For the normal as well as both lesioned monkeys, we found that saccades in all eight principal directions were guided towards salient locations, significantly above chance (scores 0.585+/-0.006 to 0.662+/-0.004, t-tests p<0.00003, 909 to 3,537 saccades per monkey in each direction). However, although lesioned monkeys overall scored lower, there was little difference in bottom-up guidance with saccade direction (scores 2.2 percent to 3.6 percent lower for saccades directed into vs. away from the lesioned hemifield). Our preliminary results suggest that the extent to which monkey saccades are attracted towards salient locations during natural vision may be less affected by the absence of primary visual cortex than previously considered.\n</div>\n\n\n</div>\n","downloads":0,"bibbaseid":"itti-yoshida-berg-ikeda-kato-takaura-isa-investigationofspontaneoussaccadesbasedonthesaliencymodelinmonkeyswithunilaterallesionofprimaryvisualcortex-2007","role":"author","year":"2007","type":"mod;su;eye;bu","title":"Investigation of spontaneous saccades based on the saliency model in monkeys with unilateral lesion of primary visual cortex","review":"abs/conf","month":"May","key":"Itti_etal07vss","id":"Itti_etal07vss","booktitle":"Proc. Vision Science Society Annual Meeting (VSS07)","bibtype":"inproceedings","bibtex":"@inproceedings{ Itti_etal07vss,\n author = {L. Itti and M. Yoshida and D. J. Berg and T. Ikeda and R. Kato\n and K. Takaura and T. Isa},\n title = {Investigation of spontaneous saccades based on the saliency\n model in monkeys with unilateral lesion of primary\n visual cortex},\n abstract = {Primary visual cortex (area V1) is the entry point of visual\n processing into the primate cortex. Yet, human and\n animal studies of V1 lesions have demonstrated a\n \"blindsight\" phenomenon, whereby residual\n visually-guided behavior remains even when large\n portions of V1 are absent. However, little is known\n quantitatively of how this residual vision (possibly\n subcortically-mediated) differs from normal\n (cortically-mediated) vision. We analyzed eye\n movements of three macaque monkeys (one normal, two\n with complete unilateral V1 ablation) watching ~54\n minutes of television (97,051 video frames). A\n computational model of bottom-up attention\n quantified how salient visual features may guide\n gaze into the normal vs. the lesioned hemifield. To\n eliminate stimulus biases, we randomly presented all\n video clips twice, original and horizontally\n flipped. We quantified the extent to which salient\n stimuli attracted gaze of each monkey by computing,\n for saccades tallied along the eight principal\n directions, a model-based bottom-up guidance score\n (chance level 0.5; ideal upper bound 1.0; practical\n inter-observer score previously measured as the\n extent to which three control monkeys predict gaze\n of a fourth monkey ~0.6). For the normal as well as\n both lesioned monkeys, we found that saccades in all\n eight principal directions were guided towards\n salient locations, significantly above chance\n (scores 0.585+/-0.006 to 0.662+/-0.004, t-tests\n p<0.00003, 909 to 3,537 saccades per monkey in each\n direction). However, although lesioned monkeys\n overall scored lower, there was little difference in\n bottom-up guidance with saccade direction (scores\n 2.2 percent to 3.6 percent lower for saccades\n directed into vs. away from the lesioned hemifield).\n Our preliminary results suggest that the extent to\n which monkey saccades are attracted towards salient\n locations during natural vision may be less affected\n by the absence of primary visual cortex than\n previously considered.},\n booktitle = {Proc. Vision Science Society Annual Meeting (VSS07)},\n year = {2007},\n month = {May},\n type = {mod;su;eye;bu},\n review = {abs/conf}\n}","author_short":["Itti, L.","Yoshida, M.","Berg, D.<nbsp>J.","Ikeda, T.","Kato, R.","Takaura, K.","Isa, T."],"author":["Itti, L.","Yoshida, M.","Berg, D. J.","Ikeda, T.","Kato, R.","Takaura, K.","Isa, T."],"abstract":"Primary visual cortex (area V1) is the entry point of visual processing into the primate cortex. Yet, human and animal studies of V1 lesions have demonstrated a \"blindsight\" phenomenon, whereby residual visually-guided behavior remains even when large portions of V1 are absent. However, little is known quantitatively of how this residual vision (possibly subcortically-mediated) differs from normal (cortically-mediated) vision. We analyzed eye movements of three macaque monkeys (one normal, two with complete unilateral V1 ablation) watching ~54 minutes of television (97,051 video frames). A computational model of bottom-up attention quantified how salient visual features may guide gaze into the normal vs. the lesioned hemifield. To eliminate stimulus biases, we randomly presented all video clips twice, original and horizontally flipped. We quantified the extent to which salient stimuli attracted gaze of each monkey by computing, for saccades tallied along the eight principal directions, a model-based bottom-up guidance score (chance level 0.5; ideal upper bound 1.0; practical inter-observer score previously measured as the extent to which three control monkeys predict gaze of a fourth monkey ~0.6). For the normal as well as both lesioned monkeys, we found that saccades in all eight principal directions were guided towards salient locations, significantly above chance (scores 0.585+/-0.006 to 0.662+/-0.004, t-tests p<0.00003, 909 to 3,537 saccades per monkey in each direction). However, although lesioned monkeys overall scored lower, there was little difference in bottom-up guidance with saccade direction (scores 2.2 percent to 3.6 percent lower for saccades directed into vs. away from the lesioned hemifield). Our preliminary results suggest that the extent to which monkey saccades are attracted towards salient locations during natural vision may be less affected by the absence of primary visual cortex than previously considered."},"bibtype":"inproceedings","biburl":"http://ilab.usc.edu/publications/src/ilab.bib","downloads":0,"search_terms":["investigation","spontaneous","saccades","based","saliency","model","monkeys","unilateral","lesion","primary","visual","cortex","itti","yoshida","berg","ikeda","kato","takaura","isa"],"title":"Investigation of spontaneous saccades based on the saliency model in monkeys with unilateral lesion of primary visual cortex","year":2007,"dataSources":["wedBDxEpNXNCLZ2sZ"]}