Temporal dynamics of attentional control settings in patients with spatial neglect

Brain Research
Radek Ptak, Laetitia Golay

Abstract

Patients with spatial neglect show disproportionately slow reactions to a contralesional stimulus presented shortly after an ipsilesional cue. We examined whether this attentional bias reflects purely automatic capture of attention by the cue or whether it is contingent on the similarity between cue and target. Patients with spatial neglect reacted to letters presented in the left or right visual field. These target letters were pre-cued by the same letter (similar cue) or a different letter (dissimilar cue) presented 100 or 1000 ms prior to target onset in the same or the opposite visual field. At the short interval, similar and dissimilar ipsilesional cues captured attention comparably and strongly slowed reactions to contralesional targets. In contrast, while similar ipsilesional cues still captured attention at the long interval dissimilar cues ceased to affect performance. In contrast, the different cueing conditions induced only small and insignificant differences in reaction times to ipsilesional targets. These findings suggest that attention of neglect patients is initially captured by all ipsilesional cues in a reflexive, stimulus-driven fashion, but that prolonged attentional capture may only be observed when cues sha...Continue Reading

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Citations

Feb 9, 2013·Neuroscience and Biobehavioral Reviews·Radek Ptak, Julia Fellrath
Nov 29, 2008·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·Radek PtakArmin Schnider
Oct 5, 2013·The Journal of Spinal Cord Medicine·Sugalya AmatachayaWantana Siritaratiwat
Nov 17, 2009·Neuropsychologia·Radek PtakRené Müri
Jun 4, 2011·The Neuroscientist : a Review Journal Bringing Neurobiology, Neurology and Psychiatry·Radek Ptak

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