Anticipatory suppression of nonattended locations in visual cortex marks target location and predicts perception.

@article{citeulike:2952919, abstract = {Spatial attention is associated with modulations in prestimulus, anticipatory blood oxygen level-dependent (BOLD) activity across the brain. It is unclear, however, if these anticipatory modulations depend on the computational demands of the upcoming task. Here, we show that anticipation of low-contrast stimuli, relative to high-contrast stimuli, is associated with increased prestimulus BOLD activity in the frontal eye field (FEF) and the posterior inferior frontal sulcus (IFS) but not in the intraparietal sulcus (IPS). In visual cortex, anticipation of low-contrast stimuli is associated with increased suppression of activity corresponding to unattended (but not attended) locations, and this suppression predicts whether subjects will accurately perceive low-contrast stimuli. These results suggest that when a stimulus will be difficult to distinguish from the background, top-down signals from FEF and IFS can facilitate perception by marking its location through the suppression of unattended locations in visual cortex.}, address = {Department of Radiology, Washington University School of Medicine, St. Louis, Missouri 63110, USA. chad@npg.wustl.edu}, author = {Sylvester, C. M. and Jack, A. I. and Corbetta, M. and Shulman, G. L. }, citeulike-article-id = {2952919}, doi = {10.1523/JNEUROSCI.0275-08.2008}, issn = {1529-2401}, journal = {The Journal of neuroscience : the official journal of the Society for Neuroscience}, keywords = {anticipatory, attention, bob, ignoring, jie, kristina, location, shiva, suppression}, month = {June}, number = {26}, pages = {6549--6556}, posted-at = {2008-07-02 17:32:39}, priority = {2}, title = {Anticipatory suppression of nonattended locations in visual cortex marks target location and predicts perception.}, url = {http://dx.doi.org/10.1523/JNEUROSCI.0275-08.2008}, volume = {28}, year = {2008} }

TY - JOUR ID - citeulike:2952919 L3 - citeulike-article-id:2952919 TI - Anticipatory suppression of nonattended locations in visual cortex marks target location and predicts perception. JF - The Journal of neuroscience : the official journal of the Society for Neuroscience VL - 28 IS - 26 SP - 6549 EP - 6556 AD - Department of Radiology, Washington University School of Medicine, St. Louis, Missouri 63110, USA. chad@npg.wustl.edu SN - 1529-2401 N2 - Spatial attention is associated with modulations in prestimulus, anticipatory blood oxygen level-dependent (BOLD) activity across the brain. It is unclear, however, if these anticipatory modulations depend on the computational demands of the upcoming task. Here, we show that anticipation of low-contrast stimuli, relative to high-contrast stimuli, is associated with increased prestimulus BOLD activity in the frontal eye field (FEF) and the posterior inferior frontal sulcus (IFS) but not in the intraparietal sulcus (IPS). In visual cortex, anticipation of low-contrast stimuli is associated with increased suppression of activity corresponding to unattended (but not attended) locations, and this suppression predicts whether subjects will accurately perceive low-contrast stimuli. These results suggest that when a stimulus will be difficult to distinguish from the background, top-down signals from FEF and IFS can facilitate perception by marking its location through the suppression of unattended locations in visual cortex. KW - anticipatory KW - attention KW - bob KW - ignoring KW - jie KW - kristina KW - location KW - shiva KW - suppression AU - Sylvester, CM AU - Jack, AI AU - Corbetta, M AU - Shulman, GL PY - 2008/06/25/ UR - http://dx.doi.org/10.1523/JNEUROSCI.0275-08.2008 ER -