【摘 要】
：
A vast majority of stroke patients with right hemisphere lesions show hemispatial neglect, a severe visuospatial impairment, where they fail to perceive items presented in the contralateral part of sp
【机 构】
：
School of Psychology University of Glasgow UK
【出 处】
：
BIT`s 3rd Annual World Congress of NeuroTalk-2012(2012第三届国际神
论文部分内容阅读
A vast majority of stroke patients with right hemisphere lesions show hemispatial neglect, a severe visuospatial impairment, where they fail to perceive items presented in the contralateral part of space.Currently, it is strongly debated whether these patients also fail to reach out and grasp objects presented in that same space.Describing a range of studies recently carried out in these patients, I will argue that immediate on-line actions such as reaching and grasping for single objects are not impaired.I will also show that neglect patients have difficulties in delayed and anti-pointing tasks which require explicit off-line, allocentric processing.Moreover using voxel-based lesionsymptom mapping (VLSM), we found that the anatomical areas critically associated with these off-line deficits are located in the temporal lobes.These areas are anatomically distinct from those implicated in direct on-line reaching and grasping.I will argue that neglect patients present action deficits only when the actions tap into more perceptual representations, thought to rely on ventral visual stream processing.Visual dorsal stream processing seems to be spared in these patients.Importantly, I will show that this spared visual dorsal stcam processiug can be exploited successfully for stroke rehabilitation.
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