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Unilateral extinction is a common consequence of unilateral brain injury in which individuals fail to detect a contralesional target when presented together with a competing ipsilesional target. Here we review the literature on the different mechanisms and anatomy hypothesized to underlie unilateral extinction. We argue that extinction, which reflects a specific deficit in the simultaneous processing...
Unilateral neglect involves deficits of spatial exploration and awareness that do not always affect a fixed portion of extrapersonal space, but may vary with current stimulation and possibly with task demands. Here, we assessed any ‘top-down’, task-related influences on visual neglect, with novel experimental variants of the cancellation test. Many different versions of the cancellation test are used...
Both impaired spatial working memory (SWM) and unilateral neglect may follow damage to the right parietal lobe. We propose that impaired SWM can exacerbate visual neglect, due to failures in remembering locations that have already been searched. When combined with an attentional bias to the ipsilesional right side, such a SWM impairment should induce recursive search of ipsilesional locations. Here...
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