Preparatory activity in visual cortex indexes distractor suppression during covert spatial orienting.

@article{citeulike:1375328, abstract = {The deployment of spatial attention induces retinotopically specific increases in neural activity that occur even before a target stimulus is presented. Although this preparatory activity is thought to prime the attended regions, thereby improving perception and recognition, it is not yet clear whether this activity is a manifestation of signal enhancement at the attended locations or suppression of interference from distracting stimuli (or both). We investigated the functional role of these preparatory shifts by isolating a distractor suppression component of selection. Behavioral data have shown that manipulating the probability that visual distractors will appear modulates distractor suppression without concurrent changes in signal enhancement. In 2 experiments, functional magnetic resonance imaging revealed increased cue-evoked activity in retinotopically specific regions of visual cortex when increased distractor suppression was elicited by a high probability of distractors. This finding directly links cue-evoked preparatory activity in visual cortex with a distractor suppression component of visual selective attention.}, address = {Department of Psychological and Brain Sciences, Johns Hopkins University, Baltimore, Maryland 21218, USA.}, author = {Serences, J. T. and Yantis, S. and Culberson, A. and Awh, E. }, citeulike-article-id = {1375328}, doi = {http://dx.doi.org/10.1152/jn.00435.2004}, issn = {0022-3077}, journal = {J Neurophysiol}, keywords = {attention, distractor, fmri}, month = {December}, number = {6}, pages = {3538--3545}, posted-at = {2007-06-10 04:33:19}, priority = {0}, title = {Preparatory activity in visual cortex indexes distractor suppression during covert spatial orienting.}, url = {http://dx.doi.org/10.1152/jn.00435.2004}, volume = {92}, year = {2004} }

TY - JOUR ID - citeulike:1375328 L3 - citeulike-article-id:1375328 TI - Preparatory activity in visual cortex indexes distractor suppression during covert spatial orienting. JF - J Neurophysiol VL - 92 IS - 6 SP - 3538 EP - 3545 AD - Department of Psychological and Brain Sciences, Johns Hopkins University, Baltimore, Maryland 21218, USA. SN - 0022-3077 N2 - The deployment of spatial attention induces retinotopically specific increases in neural activity that occur even before a target stimulus is presented. Although this preparatory activity is thought to prime the attended regions, thereby improving perception and recognition, it is not yet clear whether this activity is a manifestation of signal enhancement at the attended locations or suppression of interference from distracting stimuli (or both). We investigated the functional role of these preparatory shifts by isolating a distractor suppression component of selection. Behavioral data have shown that manipulating the probability that visual distractors will appear modulates distractor suppression without concurrent changes in signal enhancement. In 2 experiments, functional magnetic resonance imaging revealed increased cue-evoked activity in retinotopically specific regions of visual cortex when increased distractor suppression was elicited by a high probability of distractors. This finding directly links cue-evoked preparatory activity in visual cortex with a distractor suppression component of visual selective attention. KW - attention KW - distractor KW - fmri AU - Serences, JT AU - Yantis, S AU - Culberson, A AU - Awh, E PY - 2004/12// UR - http://dx.doi.org/10.1152/jn.00435.2004 ER -