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Visual Agnosia

Visual Agnosia

Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round...

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Updated: Jan 17, 2026

Brain Imaging Investigation of the Neural Correlates of Emotional Autobiographical Recollection

Brain Imaging Investigation of the Neural Correlates of Emotional Autobiographical Recollection

Published on: August 26, 2011

视觉场景记忆的大脑基质:一个损伤行为映射研究.

Shir Ben-Zvi Feldman^1,2, Nachum Soroker^1,3, Daniel A Levy^2,4

¹Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.

Frontiers in human neuroscience

|September 17, 2025

概括

患有右半球损伤的中风患者在视觉场景记忆中表现出显著的缺陷,影响了身份,位置和行动的回忆. 损伤映射揭示了左半球和右半球不同的大脑网络,支持视觉记忆的不同方面.

关键词:

维克斯勒记忆量表维克斯勒记忆量表伤口的伤口是一个伤口.召回召回召回召回召回召回一次性中风中风中风中风中风视觉场景记忆视觉场景记忆

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Translational Brain Mapping at the University of Rochester Medical Center: Preserving the Mind Through Personalized Brain Mapping

Translational Brain Mapping at the University of Rochester Medical Center: Preserving the Mind Through Personalized Brain Mapping

Published on: August 12, 2019

Eye Movement Monitoring of Memory

Eye Movement Monitoring of Memory

Published on: August 15, 2010

相关实验视频

Last Updated: Jan 17, 2026

Brain Imaging Investigation of the Neural Correlates of Emotional Autobiographical Recollection

Brain Imaging Investigation of the Neural Correlates of Emotional Autobiographical Recollection

Published on: August 26, 2011

Translational Brain Mapping at the University of Rochester Medical Center: Preserving the Mind Through Personalized Brain Mapping

Translational Brain Mapping at the University of Rochester Medical Center: Preserving the Mind Through Personalized Brain Mapping

Published on: August 12, 2019

Eye Movement Monitoring of Memory

Eye Movement Monitoring of Memory

Published on: August 15, 2010

科学领域:

神经科学是一个神经科学.
认知心理学认知心理学
神经学神经学

背景情况:

视觉场景记忆涉及腹部和背部视觉流,中部皮质,以及前部,部和顶部区域.
讨论了这些区域在记住不同视觉元素方面的确切作用.
神经成像表明,不同的网络组件用于视觉信息的感知和记忆.

研究的目的:

研究中风病变地形对视觉场景中身份,位置和行动的回忆的影响.
用WMS-III家庭图片子测试来评估中风患者的记忆缺陷.

主要方法:

93名首次中风患者 (RHD和LHD) 执行了家庭图片任务.
基于Voxel的病变症状映射 (VLSM) 确定了与场景元素记忆缺陷相关的脑病变.
行为分析将患者的表现与健康对照进行比较.

主要成果:

与对照组相比,右半球损伤 (RHD) 患者在身份,位置和行动记忆方面表现出显著的损伤.
与即时测试相比,延迟测试中的记忆回忆率较低.
观察到记忆得分的层次结构:身份>位置>行动.
VLSM揭示了右半球 (,) 和左半球 (-,MTL) 中明显的病变模式.

结论:

视觉场景记忆依赖于双半球网络,左半球在temporo-occipital/MTL结构中占主导地位,右半球在temporo-parietal区域中占主导地位.
左半球网络通常是非特定的,而右半球网络显示出更大的参与特定的场景元素记忆.