Mancini Flavia, Bricolo Emanuela, Mattioli Flavia C, Vallar Giuseppe
Department of Psychology, University of Milano-Bicocca Milano, Italy.
Front Psychol. 2011 Nov 22;2:341. doi: 10.3389/fpsyg.2011.00341. eCollection 2011.
Unilateral spatial neglect (USN) has been mainly investigated in the visual modality; only few studies compared spatial neglect across different sensory modalities, and explored their multisensory interactions, with controversial results. We investigated the integration between vision and haptics, through a bisection task of a cross modal illusion, the Judd variant of the Müller-Lyer illusion. We examined right-brain-damaged patients with (n = 7) and without (n = 7) left USN, and neurologically unimpaired participants (n = 14) in the bisection of Judd stimuli under visual, haptic, and visuo-haptic presentation. Neglect patients showed the characteristic rightward bias in the bisection of the baseline stimuli in the visual modality, but not in the haptic and visuo-haptic conditions. The illusory effects were preserved in each group and in each modality, indicating that the processing of the cross modal illusion is independent of the presence of deficits of spatial attention and representation. Spatial neglect can be modality-specific, but visual and tactile sensory inputs are properly integrated.
单侧空间忽视（USN）主要是在视觉模态中进行研究；只有少数研究比较了不同感觉模态下的空间忽视情况，并探讨了它们的多感觉交互作用，结果存在争议。我们通过一种跨模态错觉的平分任务，即穆勒-莱尔错觉的贾德变体，研究了视觉与触觉之间的整合。我们检查了患有（n = 7）和未患有（n = 7）左侧USN的右脑损伤患者，以及神经功能未受损的参与者（n = 14）在视觉、触觉和视觉-触觉呈现条件下对贾德刺激进行平分的情况。忽视患者在视觉模态下对基线刺激的平分中表现出典型的向右偏差，但在触觉和视觉-触觉条件下则没有。每组和每种模态下错觉效应均得以保留，这表明跨模态错觉的处理与空间注意力和表征缺陷的存在无关。空间忽视可能具有模态特异性，但视觉和触觉感觉输入能得到适当整合。
