Visual processing in Alzheimer's disease: Surface detail and colour fail to aid object identification
Visual processing in Alzheimer's disease: Surface detail and colour fail to aid object identification
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DOI：
10.1016/j.neuropsychologia.2009.05.004
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发表时间：
2009-10-01
期刊：
影响因子：
2.6
通讯作者：
Gale, Tim M.
中科院分区：
文献类型：
--
作者：
Adlington, Rebecca L.;Laws, Keith R.;Gale, Tim M.
有人认为，阿尔茨海默病（AD）患者的物体识别可能受到图像格式（例如彩色与线条画）和低水平视觉障碍的强烈影响。为了检验这些概念，我们测试了41名AD患者和40名健康老年人对照的基本视觉功能和图片命名。图片命名使用105幅代表广泛的生命和非生命子类别的图像进行检查（来自Hatfield图像测试[HIT]：一、劳斯，K。R.，& Gale，T. M. (in Press）。哈特菲尔德图像测试（HIT）：一种新的图像测试和实验和临床使用的规范。临床和实验神经心理学杂志]），每个项目以彩色，灰度或线条绘制的格式呈现。虽然老年对照组的命名随着表面细节和颜色的增加而线性改善，但AD患者没有从表面信息或颜色的增加中获益。此外，对照组显示了一个重要的类别格式的相互作用：然而，同样的配置文件没有出现AD患者。最后，AD患者在视觉功能任务上表现出广泛而显著的损害，并且低水平的视觉损害预测患者命名。(C)2009爱思唯尔有限公司保留所有权利。
It has been suggested that object recognition in patients with Alzheimer's disease (AD) may be strongly influenced both by image format (e.g. colour vs. line-drawn) and by low-level visual impairments, To examine these notions, we tested basic visual functioning and picture naming in 41 AD patients and 40 healthy elderly controls. Picture naming was examined using 105 images representing a wide range of living and nonliving subcategories (from the Hatfield image test [HIT]: [Adlington, R. A., Laws, K. R., & Gale, T. M. (in press). The Hatfield image test (HIT): A new picture test and norms for experimental and clinical use.Journal of Clinical and Experimental Neuropsychology]), with each item presented in colour, greyscale, or line-drawn formats. Whilst naming for elderly controls improved linearly with the addition of surface detail and colour, AD patients showed no benefit from the addition of either surface information or colour. Additionally, controls showed a significant category by format interaction: however, the same profile did not emerge for AD patients. Finally, AD patients showed widespread and significant impairment on tasks of visual functioning, and low-level visual impairment was predictive of patient naming. (C) 2009 Elsevier Ltd. All rights reserved.