Visual perception supported by verbal mediation in an individual with cerebral visual impairment (CVI).
Visual perception supported by verbal mediation in an individual with cerebral visual impairment (CVI).
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DOI：
10.1016/j.neuropsychologia.2021.107982
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发表时间：
2021-09-17
期刊：
影响因子：
2.6
通讯作者：
Merabet LB
中科院分区：
文献类型：
--
作者：
Pamir Z;Bauer CM;Bennett CR;Kran BS;Merabet LB
脑性视觉障碍（CVI）通常表现为与高阶视觉加工相关的缺陷。我们报告一个个案的个案与CVI谁使用口头调解策略来感知和互动与他的视觉环境。使用基于虚拟现实的视觉搜索任务结合眼动追踪来评估视觉感知性能。功能磁共振成像（fMRI）用于识别与该策略相关的神经关联。我们发现，当使用言语调解时，个体可以很容易地检测和跟踪视觉场景中的目标，这与枕-顶叶-颞叶视觉皮质区域网络的强大激活有关。相反，当不使用言语调解时，个体完全无法完成任务，这与视觉皮层激活显著降低有关。这种独特的补偿策略可能与个体使用语言工作记忆来理解复杂的视觉信息有关。
Cerebral visual impairment (CVI) often presents with deficits associated with higher order visual processing. We report a case of an individual with CVI who uses a verbal mediation strategy to perceive and interact with his visual surroundings. Visual perceptual performance was assessed using a virtual reality based visual search task combined with eye tracking. Functional magnetic resonance imaging (fMRI) was employed to identify the neural correlates associated with this strategy. We found that when using verbal mediation, the individual could readily detect and track the target within the visual scene which was associated with robust activation within a network of occipito-parieto-temporal visual cortical areas. In contrast, when not using verbal mediation, the individual was completely unable to perform the task, and this was associated with dramatically reduced visual cortical activation. This unique compensatory strategy may be related to the individual’s use of verbal working memory for the purposes of understanding complex visual information.
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