Wayfinding in familiar and unfamiliar environments in a case of progressive topographical agnosia
Wayfinding in familiar and unfamiliar environments in a case of progressive topographical agnosia
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DOI：
10.1080/13554790591006069
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发表时间：
2005-10-01
期刊：
影响因子：
0.8
通讯作者：
Péruch, P
中科院分区：
文献类型：
--
作者：
Rainville, C;Joubert, S;Péruch, P
一位71岁的右撇子(F.G.)出现面容失认症，无法辨认著名和熟悉的建筑。尽管有缺陷，F.G.在执行功能、语言、练习和主要视觉操作技能的神经心理测试中获得了正常分数。脑MRI显示萎缩主要发生在右侧颞叶，特别是梭状回和海马旁皮质。本研究调查了F.G.S在熟悉和陌生环境中的自我定位能力。他在熟悉的环境(即他的家乡)中的认路能力得到了保存，尽管他无法识别这种环境中熟悉的和著名的建筑、纪念碑和地标。寻路是通过严重依赖书面指示(例如，餐馆和街道的名称)、保存这个熟悉环境的预先存在的认知地图以及计划执行给定轨迹所必需的正常执行功能来实现的。在一个陌生的环境中，F.G.S的地形失认导致严重的寻路困难，并导致无法建立足够的认知空间表征。F·G·S的地形性失认是高水平视觉知觉缺陷的结果，其特征是无法获得复杂视觉刺激的全球配置，如熟悉的和著名的古迹，以及对局部特征的过度依赖。
A 71-year-old right-handed man (F.G.) presents with prosopagnosia and with an inability to recognize famous and familiar buildings. Despite his deficit, F.G. obtained normal scores on neuropsychological tests of executive functions, language, praxis and primary visuoperceptual skills. Brain MRI showed atrophy predominantly in the right temporal lobe, particularly in the fusiform gyrus and the parahippocampal cortex. The present study investigated F.G.'s ability to orient himself in familiar and new environments. His wayfinding abilities in a familiar environment (i.e., his hometown) were preserved despite an inability to recognize familiar and famous buildings, Monuments and landmarks in this environment. Wayfinding was achieved through a heavy reliance on written indications (e.g., names of restaurants and streets), preservation of a pre-existing cognitive map of this familiar environment, and normal executive functions necessary to plan the execution of a given trajectory. In an unfamiliar environment, F.G.'s topographical agnosia resulted in severe wayfinding difficulties and in the inability to build an adequate cognitive spatial representation. F.G.'s topographical agnosia results from a high-level visuoperceptual deficit, characterized by an inability to access a global configuration of complex Visual stimuli such as familiar and famous monuments, and an over-reliance on the processing of local features.