The Effect of Spatial Attention on Contrast Response Functions in Human Visual Cortex

The Effect of Spatial Attention on Contrast Response Functions in Human Visual Cortex. Buracas, G. T. & Boynton, G. M. The Journal of Neuroscience, 27(1):93--97, January, 2007. PMID: 17202476

Paper doi abstract bibtex

Previous electrophysiology data suggests that the modulation of neuronal firing by spatial attention depends on stimulus contrast, which has been described using either a multiplicative gain or a contrast-gain model. Here we measured the effect of spatial attention on contrast responses in humans using functional MRI. To our surprise, we found that the modulation of blood oxygenation level-dependent (BOLD) responses by spatial attention does not greatly depend on stimulus contrast in visual cortical areas tested [V1, V2, V3, and MT+ (middle temporal area)]. An additive model, rather than a multiplicative or contrast-gain model best describes the attentional modulations in V1. This inconsistency with previous single-unit electrophysiological data has implications for the population-based neuronal source of the BOLD signal.

@article{ buracas_effect_2007,
  title = {The Effect of Spatial Attention on Contrast Response Functions in Human Visual Cortex},
  volume = {27},
  issn = {0270-6474, 1529-2401},
  url = {http://www.jneurosci.org/content/27/1/93},
  doi = {10.1523/JNEUROSCI.3162-06.2007},
  abstract = {Previous electrophysiology data suggests that the modulation of neuronal firing by spatial attention depends on stimulus contrast, which has been described using either a multiplicative gain or a contrast-gain model. Here we measured the effect of spatial attention on contrast responses in humans using functional {MRI.} To our surprise, we found that the modulation of blood oxygenation level-dependent ({BOLD)} responses by spatial attention does not greatly depend on stimulus contrast in visual cortical areas tested [V1, V2, V3, and {MT+} (middle temporal area)]. An additive model, rather than a multiplicative or contrast-gain model best describes the attentional modulations in V1. This inconsistency with previous single-unit electrophysiological data has implications for the population-based neuronal source of the {BOLD} signal.},
  language = {en},
  number = {1},
  urldate = {2013-05-20},
  journal = {The Journal of Neuroscience},
  author = {Buracas, Giedrius T. and Boynton, Geoffrey M.},
  month = {January},
  year = {2007},
  note = {{PMID:} 17202476},
  keywords = {Contrast, additive, {fMRI}, functional imaging, spatial attention, vision},
  pages = {93--97}
}

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Here we measured the effect of spatial attention on contrast responses in humans using functional {MRI.} To our surprise, we found that the modulation of blood oxygenation level-dependent ({BOLD)} responses by spatial attention does not greatly depend on stimulus contrast in visual cortical areas tested [V1, V2, V3, and {MT+} (middle temporal area)]. An additive model, rather than a multiplicative or contrast-gain model best describes the attentional modulations in V1. This inconsistency with previous single-unit electrophysiological data has implications for the population-based neuronal source of the {BOLD} signal.},\n language = {en},\n number = {1},\n urldate = {2013-05-20},\n journal = {The Journal of Neuroscience},\n author = {Buracas, Giedrius T. and Boynton, Geoffrey M.},\n month = {January},\n year = {2007},\n note = {{PMID:} 17202476},\n keywords = {Contrast, additive, {fMRI}, functional imaging, spatial attention, vision},\n pages = {93--97}\n}</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" id=\"abstract_buracas_effect_2007\"\n style=\"display:none\">\n Previous electrophysiology data suggests that the modulation of neuronal firing by spatial attention depends on stimulus contrast, which has been described using either a multiplicative gain or a contrast-gain model. Here we measured the effect of spatial attention on contrast responses in humans using functional MRI. 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This inconsistency with previous single-unit electrophysiological data has implications for the population-based neuronal source of the BOLD signal.\n</div>\n\n\n</div>\n","downloads":0,"bibbaseid":"buracas-boynton-theeffectofspatialattentiononcontrastresponsefunctionsinhumanvisualcortex-2007","urls":{"Paper":"http://www.jneurosci.org/content/27/1/93"},"role":"author","year":"2007","volume":"27","urldate":"2013-05-20","url":"http://www.jneurosci.org/content/27/1/93","type":"article","title":"The Effect of Spatial Attention on Contrast Response Functions in Human Visual Cortex","pages":"93--97","number":"1","note":"PMID: 17202476","month":"January","language":"en","keywords":"Contrast, additive, fMRI, functional imaging, spatial attention, vision","key":"buracas_effect_2007","journal":"The Journal of Neuroscience","issn":"0270-6474, 1529-2401","id":"buracas_effect_2007","doi":"10.1523/JNEUROSCI.3162-06.2007","bibtype":"article","bibtex":"@article{ buracas_effect_2007,\n title = {The Effect of Spatial Attention on Contrast Response Functions in Human Visual Cortex},\n volume = {27},\n issn = {0270-6474, 1529-2401},\n url = {http://www.jneurosci.org/content/27/1/93},\n doi = {10.1523/JNEUROSCI.3162-06.2007},\n abstract = {Previous electrophysiology data suggests that the modulation of neuronal firing by spatial attention depends on stimulus contrast, which has been described using either a multiplicative gain or a contrast-gain model. 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This inconsistency with previous single-unit electrophysiological data has implications for the population-based neuronal source of the {BOLD} signal.},\n language = {en},\n number = {1},\n urldate = {2013-05-20},\n journal = {The Journal of Neuroscience},\n author = {Buracas, Giedrius T. and Boynton, Geoffrey M.},\n month = {January},\n year = {2007},\n note = {{PMID:} 17202476},\n keywords = {Contrast, additive, {fMRI}, functional imaging, spatial attention, vision},\n pages = {93--97}\n}","author_short":["Buracas, G.<nbsp>T.","Boynton, G.<nbsp>M."],"author":["Buracas, Giedrius T.","Boynton, Geoffrey M."],"abstract":"Previous electrophysiology data suggests that the modulation of neuronal firing by spatial attention depends on stimulus contrast, which has been described using either a multiplicative gain or a contrast-gain model. Here we measured the effect of spatial attention on contrast responses in humans using functional MRI. 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