Pure topographical disorientation in novel environments without anterograde amnesia: a case study |
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| Authors: | Yuka Oishi Tatsushi Yamakawa Hikaru Nagasawa Kyoko Suzuki |
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| Affiliation: | 1. Department of Clinical Neuroscience, Yamagata University Graduate School of Medicine, Yamagata, Japan;2. Department of Speech, Language, and Hearing Sciences, Niigata University of Health and Welfare, Niigata, Japanoishi@nuhw.ac.jp;4. Department of Neurology, Yamagata Prefectural Central Hospital, Yamagata, Japan;5. Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University Graduate School of Medicine, Sendai, Japan |
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| Abstract: | ABSTRACTTopographical disorientation (TD) in novel environments is considered to be a part of anterograde amnesia. A 56-year-old woman presented with pure TD only in novel environments following limbic encephalitis. She could not remember directions inside the hospital on weekly outpatient visits; however, her verbal and visual anterograde memories were normal. In the test of learning photographs of scenes, faces, and objects, only her scores for landscapes were worse than those in healthy controls. These findings suggested that her TD specific to landscapes and directions in novel environments was caused by category-specific memory impairment related to bilateral hippocampal and parahippocampal dysfunction. |
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| Keywords: | Topographical disorientation landmark agnosia directional disorientation hippocampal gyrus parahippocampal gyrus |
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