Impaired perception of simultaneous stimuli in a patient with posterior cortical atrophy: an attentional account. Issue 2 (3rd March 2020)

• Record Type: Journal Article
• Authors: Fernandez-Duque, Diego; Black, Sandra E.
• Is Part Of: Neurocase. Volume 26:Issue 2(2020)
• Page Start: 69
• Page End: 78
• Publication Date: 2020-03-03
• Subjects: Simultanagnosia -- Balint's syndrome -- perceptual awareness -- consciousness; Neurology -- Periodicals; Neuropsychology -- Case Report; Mental Disorders -- Case Report; Nervous System Diseases -- Case Report; 616.8
• DOI: 10.1080/13554794.2020.1729385
• Languages: English
• ISSNs: 1355-4794

Abstract

ABSTRACT: We assessed visuospatial abilities in PCA. Sequential display of two simple geometric figures enhanced detection and discrimination relative to simultaneous display (Exps 1 & 2). Comparing edges of a single object enhanced discrimination relative to comparing edges of two separate objects, consistent with object-based attention (Exp. 3). Recognition of complex line drawings was spared for a single object but disrupted by an attention-grabbing small circle (Exp. 4). A covert orienting task showed difficulty disengaging from previous locations and attentional bias toward the right visual field (Exp. 5). These findings shed light on the role of visual attention in perceptual awareness.