Article

When searching for a target presented among distractors by means of Rapid Serial
Visual Presentation (RSVP), participants often report the stimulus that is
preceding or following the target as being the target. These so-called temporal
binding errors are accompanied by high levels of confidence so that participants
are bemused with the mismatch between their perceptual experience and the actual
presented stimulus. By contrast with spatial binding the neural basis for
temporal binding errors remains unexplored. Previous neuropsychology studies
using non-spatial selective attention tasks have shown that right
temporo-parietal cortex is involved in the temporal deployment of attention. Here
we investigated the neural basis of temporal binding in five patients with visual
extinction whose lesions involved different cortical areas in the right
hemisphere, including the temporo-parietal cortex. Patients made significantly
more binding errors for contralesional than ipsilesional stimuli and more binding
errors than healthy controls. Incorrect binding from distractors near to the
target was the most common for both patients and controls. Eye movements did not
contribute to the pattern of results. These results show that right hemisphere
cortical areas contribute to the accurate temporal coding of visual features.
CI - Copyright (c) 2011 Elsevier Ltd. All rights reserved.

Langue : ANGLAIS