AFNI: software for analysis and visualization of functional magnetic resonance neuroimages
Computers and Biomedical Research
Common blood flow changes across visual tasks: Ii. decreases in cerebral cortex
Journal of Cognitive Neuroscience
Transcranial magnetic stimulation of the prefrontal cortex delays contralateral endogenous saccades
Journal of Cognitive Neuroscience
Journal of Cognitive Neuroscience
Neural Correlates of Attentional Capture in Visual Search
Journal of Cognitive Neuroscience
Covert Reorienting and Inhibition of Return: An Event-Related fMRI Study
Journal of Cognitive Neuroscience
fMRI Study of Cognitive Interference Processing in Females with Fragile X Syndrome
Journal of Cognitive Neuroscience
Failed Suppression of Direct Visuomotor Activation in Parkinson's Disease
Journal of Cognitive Neuroscience
Neural Mechanisms of Visual Attention: Object-Based Selection of a Region in Space
Journal of Cognitive Neuroscience
Attention Mechanisms in Visual Search - An fMRI Study
Journal of Cognitive Neuroscience
Volitional Covert Orienting to a Peripheral Cue Does Not Suppress Cue-induced Inhibition of Return
Journal of Cognitive Neuroscience
Journal of Cognitive Neuroscience
Anterior intraparietal sulcus is sensitive to bottom-up attention driven by stimulus salience
Journal of Cognitive Neuroscience
Journal of Cognitive Neuroscience
Brain structures involved in visual search in the presence and absence of color singletons
Journal of Cognitive Neuroscience
Journal of Cognitive Neuroscience
Cognitive load can explain differences in active and passive touch
EuroHaptics'12 Proceedings of the 2012 international conference on Haptics: perception, devices, mobility, and communication - Volume Part I
Journal of Cognitive Neuroscience
Hi-index | 0.00 |
Whole-brain functional magnetic resonance imaging (MRI) was used to examine the neural substrates of internally (endogenous) and externally (exogenous) induced covert shifts of attention. Thirteen normal subjects performed three orienting conditions: endogenous (location of peripheral target predicted by a central arrow 80% of the time), exogenous (peripheral target preceded by a noninformative peripheral cue), and control (peripheral target preceded by noninformative central cue). Behavioral results indicated faster reaction times (RTs) for valid than for invalid trials for the endogenous condition but slower RTs for valid than for invalid trials for the exogenous condition (inhibition of return). The spatial extent and intensity of activation was greatest for the endogenous condition, consistent with the hypothesis that endogenous orienting is more effortful (less automatic) than exogenous orienting. Overall, we did not observe distinctly separable neural systems associated with the endogenous and exogenous orienting conditions. Both exogenous and endogenous orienting, but not the control condition, activated bilateral parietal and dorsal premotor regions, including the frontal eye fields. These results suggest a specific role for these regions in preparatory responding to peripheral stimuli. The right dorsolateral prefrontal cortex (BA 46) was activated selectively by the endogenous condition. This finding suggests that voluntary, but not reflexive, shifts of attention engage working memory systems.