Department of Experimental Psychology, Helmholtz Institute, Utrecht University, Utrecht, The Netherlands.
Conscious Cogn. 2010 Mar;19(1):186-97. doi: 10.1016/j.concog.2009.11.003. Epub 2009 Dec 8.
Visual neglect has been associated with an imbalance in the level of activity in the saccadic system: activity in the contralesional field is suppressed, which makes target selection unlikely. We recorded eye movements of a patient with hemispatial neglect and a group of healthy participants during an oculomotor distractor paradigm. Results showed that the interfering effects of a distractor were very strong when presented in her ipsilesional visual field. However, when the distractor was presented in her contralesional field, there were no interfering effects when the target was presented in her ipsilesional field. These findings could not be explained by the presence of a visual field defect as revealed by the results of two hemianopic patients. Our results are in line with an imbalance in the level of activity in the saccadic system in visual neglect because visual elements presented in the contralesional field did not compete for saccadic selection.
对侧视野的活动受到抑制，从而使目标选择变得不太可能。我们在眼动干扰范式中记录了一位半空间忽视患者和一组健康参与者的眼动。结果表明，当干扰物出现在患者的同侧视野时，其干扰作用非常强。然而，当干扰物出现在对侧视野时，如果目标出现在患者的同侧视野，则没有干扰作用。这一结果不能用两位偏盲患者的结果所揭示的视野缺陷来解释。我们的结果与视觉忽视中眼跳系统活动水平失衡一致，因为出现在对侧视野的视觉元素不会争夺眼跳选择。
