Varnava Alice, Dervinis Martynas, Chambers Christopher D
Department of Psychology, Swansea University, Swansea, United Kingdom ; School of Psychology, Cardiff University, Cardiff, United Kingdom.
PLoS One. 2013 Jun 18;8(6):e65851. doi: 10.1371/journal.pone.0065851. Print 2013.
Following parietal damage most patients with visual neglect bisect horizontal lines significantly away from the true centre. Neurologically intact individuals also misbisect lines; a phenomenon referred to as 'pseudoneglect'. In this study we examined the relationship between neglect and pseudoneglect by testing how patterns of pre-existing visuospatial asymmetry predict asymmetry caused by parietal interference. Twenty-four participants completed line bisection and Landmark tasks before receiving continuous theta burst stimulation to the left or right angular gyrus. Results showed that a pre-existing pattern of left pseudoneglect (i.e. right bias), but not right pseudoneglect, predicts left neglect-like behaviour during line bisection following right parietal cTBS. This correlation is consistent with the view that neglect and pseudoneglect arise via a common or linked neural mechanism.
顶叶损伤后，大多数患有视觉忽视症的患者在平分水平线时会明显偏离真正的中心。神经系统完好的个体也会错误地平分线条；这种现象被称为“假性忽视”。在本研究中，我们通过测试预先存在的视觉空间不对称模式如何预测顶叶干扰引起的不对称，来研究忽视与假性忽视之间的关系。24名参与者在接受左侧或右侧角回的连续theta爆发刺激之前，完成了线条平分和地标任务。结果表明，预先存在的左侧假性忽视模式（即右侧偏差），而非右侧假性忽视，可预测右侧顶叶cTBS后线条平分过程中类似左侧忽视的行为。这种相关性与忽视和假性忽视通过共同或相关的神经机制产生的观点一致。
