Neural networks underlying endogenous and exogenous visual–spatial orienting

  title={Neural networks underlying endogenous and exogenous visual–spatial orienting},
  author={Andrew R. Mayer and Jill M. Dorflinger and Stephen M. Rao and Michael Seidenberg},
The Frontal Cortex and Exogenous Attentional Orienting
The results suggest that the dorsolateral prefrontal cortex plays an important role in exogenous orienting and that component processes of this system may be differentially impaired by damage to different parts of the dorsal prefrontal cortex.
Automatic visuospatial attention shifts : perceptual correlates, interventions and oscillatory signatures
There appears to be strong interplay between endogenous control and exogenously driven attention processes, and one approach to achieve this is by manipulating both types of attention simultaneously instead of in separation, as illustrated in the present work.
Differential impact of endogenous and exogenous attention on activity in human visual cortex
Findings reveal that endogenous and exogenous attention distinctly modulate activity in visuo-occipital areas during orienting and reorienting; endogenous attention facilitates both the encoding and the readout of visual information whereas exogenous Attention only facilitates the encoding of information.
ERP and fMRI correlates of endogenous and exogenous focusing of visual‐spatial attention
Findings indicate that N1 indexes exogenous orienting of attention and is likely to represent the activity of frontal and parietal components of the attention network involved in eliciting attention changes.
Endogenous and exogenous attention distinctly modulate fMRI activity in visual cortex
Endogenous and exogenous attention distinctly modulate activity in visual areas due to their differential engagement of top-down and bottom-up processes.
FMRI correlates of visuo‐spatial reorienting investigated with an attention shifting double‐cue paradigm
It is found that both endogenous and exogenous cues affected behavioral performance, speeding‐up or slowing‐down target discrimination when valid and invalid, respectively, and the results indicate the existence of separate, noninteracting neural circuits for endogenous andExogenous reorienting of visuo‐spatial attention.


An Event-related fMRI Study of Exogenous Orienting: Supporting Evidence for the Cortical Basis of Inhibition of Return?
Results provide support for both attentional and oculomotor theories of IOR and suggest that IOR may be mediated by two networks, one of which may mediate the inhibitory bias following an exogenous cue, whereas a separate network may be activated when a response must be made to stimuli that appear in inhibited locations of space.
Cerebral correlates of alerting, orienting and reorienting of visuospatial attention: an event-related fMRI study
The Large-Scale Neural Network for Spatial Attention Displays Multifunctional Overlap But Differential Asymmetry
Both exogenous (based on spatial priming) and endogenous ( based on expectancy cueing) shifts of attention are subserved by a common network of cortical and subcortical regions, however, the differences between the two tasks, especially in the degree of rightward asymmetry, suggests that the pattern of activation within this network may show variations that reflect the specific attributes of the attentional task.
Shifting visual attention in space: an electrophysiological analysis using high spatial resolution mapping
A large-scale distributed network for covert spatial attention: further anatomical delineation based on stringent behavioural and cognitive controls.
Although the task required attention to be equally shifted to the left and to the right, eight of 10 subjects showed a greater area of activation in the right parietal cortex, consistent with the specialization of the right hemisphere for spatial attention.
Functional localization of the system for visuospatial attention using positron emission tomography.
The two attention tasks evoked largely overlapping patterns of neural activation, supporting the existence of a general neural system for visuospatial attention with regional functional specialization.
Covert Reorienting and Inhibition of Return: An Event-Related fMRI Study
Covert reorienting to a target appearing within 250 msec after an invalid contralateral location cue elicited increased activation in the left fronto-polar cortex, right anterior and left posterior middle frontal gyrus, and right cerebellum, areas that have previously been associated with attentional processes, specifically attentional change.
Control of goal-directed and stimulus-driven attention in the brain
Evidence for partially segregated networks of brain areas that carry out different attentional functions is reviewed, finding that one system is involved in preparing and applying goal-directed selection for stimuli and responses, and the other is specialized for the detection of behaviourally relevant stimuli.
Transient neural activity in human parietal cortex during spatial attention shifts
Brain activity during attention shifts using rapid, event-related fMRI of human observers as they covertly shifted attention between two peripheral spatial locations suggests that activation of the parietal cortex is associated with a discrete signal to shift spatial attention, and is not the source of a signal to continuously maintain the current attentive state.
Neural Mechanisms of Visual Attention: Object-Based Selection of a Region in Space
Objects play an important role in guiding spatial attention through a cluttered visual environment. We used event-related functional magnetic resonance imaging (ER-fMRI) to measure brain activity