Visual perception supported by verbal mediation in an individual with cerebral visual impairment (CVI).

ABSTRACT: 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

SUBMITTER: Pamir Z 

PROVIDER: S-EPMC8405572 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature