Research School of Psychology, The Australian National University, Building 39, Science Road, Canberra, ACT, 2601, Australia.
Research School of Psychology, The Australian National University, Building 39, Science Road, Canberra, ACT, 2601, Australia.
Neuropsychologia. 2020 Sep;146:107547. doi: 10.1016/j.neuropsychologia.2020.107547. Epub 2020 Jun 28.
Patients with visuospatial neglect exhibit a failure to detect, respond, or orient towards information located in the side of space opposite to their brain lesion. To extend our understanding of the underlying cognitive processes involved in neglect, some studies have used eye movement measurements to complement behavioural data. We provide a qualitative synthesis of studies that have used eye-tracking in patients with neglect, with a focus on highlighting the utility of examining eye movements and reporting what eye-tracking has revealed about visual search patterns in these patients. This systematic review includes twenty studies that met the eligibility criteria. We extracted information pertaining to patient characteristics (e.g., age, type of stroke, time since stroke), neglect test(s) used, type of stimuli (e.g., static, dynamic), eye-tracker specifications (e.g., temporal and spatial resolution), and eye movement measurements (e.g., saccade amplitude, fixation duration). Five key themes were identified. First, eye-tracking is a useful tool to complement pen-and-paper neglect tests. Second, the lateral asymmetrical bias in eye movement patterns observed during active exploration also occurred while at rest. Third, the lateral asymmetrical bias was evident not only in the horizontal plane but also in the vertical plane. Fourth, eye movement patterns were modulated by stimulus- and task-related factors (e.g., visual salience, local perceptual features, image content, stimulus duration, presence of distractors). Fifth, measuring eye movements in patients with neglect is useful for determining and understanding other cognitive impairments, such as spatial working memory. To develop a fuller, and a more accurate, picture of neglect, future research would benefit from eye movement measurements.
视空间忽略症患者表现出无法检测、响应或定向到位于大脑损伤对侧空间的信息。为了扩展我们对涉及忽略的潜在认知过程的理解，一些研究使用眼动测量来补充行为数据。我们对使用眼动追踪技术的忽略症患者进行了定性综合分析，重点强调了检查眼动并报告眼动追踪在这些患者的视觉搜索模式中揭示了什么的效用。这项系统综述包括符合入选标准的 20 项研究。我们提取了与患者特征（例如年龄、中风类型、中风后时间）、忽略测试类型、刺激类型（例如静态、动态）、眼动追踪器规格（例如时间和空间分辨率）以及眼动测量（例如扫视幅度、注视持续时间）相关的信息。确定了五个关键主题。首先，眼动追踪是补充纸笔忽略测试的有用工具。其次，在主动探索过程中观察到的眼动模式的横向不对称偏差也在休息时发生。第三，这种横向不对称偏差不仅在水平平面上而且在垂直平面上都很明显。第四，眼动模式受到刺激和任务相关因素的调节（例如视觉显著性、局部感知特征、图像内容、刺激持续时间、存在干扰物）。第五，测量忽略症患者的眼动对于确定和理解其他认知障碍（例如空间工作记忆）很有用。为了更全面、更准确地了解忽略症，未来的研究将受益于眼动测量。
