Foundations of cognitive science
Journal of Cognitive Neuroscience
Parietal Lobe Lesions Disrupt Saccadic Remapping of Inhibitory Location Tagging
Journal of Cognitive Neuroscience
Contribution of the Primate Superior Colliculus to Inhibition of Return
Journal of Cognitive Neuroscience
Covert Reorienting and Inhibition of Return: An Event-Related fMRI Study
Journal of Cognitive Neuroscience
Normal and impaired reflexive orienting of attention after central nonpredictive cues
Journal of Cognitive Neuroscience
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Normal functioning of the attentional orienting system is critical for effective behavior and is predicated on a balanced interaction between goal-directed (endogenous) processes and stimulus-driven (exogenous) processes. Although both systems have been subject to much investigation, little is known about the neural underpinnings of exogenous orienting. In the present study, we examined the early facilitatory effects and later inhibition of return effects of exogenous cues in patients with frontal and parietal lesions. Three novel findings emerged from this study. First, unilateral frontoparietal damage appears not to affect the early facilitation effects of exogenous cues. Second, dorsolateral prefrontal damage, especially lesions involving the inferior frontal gyrus, produces an exogenous disengage deficit (i.e., the sluggish withdrawal of attention from the ipsilesional to the contralesional field). Third, a subset of patients with dorsolateral prefrontal damage, with lesions involving the middle frontal gyrus, have a reorienting deficit that extends in duration well beyond established boundaries of the normal reflexive orienting system. These 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 dorsolateral prefrontal cortex.