Impaired perception of simultaneous stimuli in a patient with posterior cortical atrophy: an attentional account.

Impaired perception of simultaneous stimuli in a patient with posterior cortical atrophy: an attentional account.
Neurocase. 2020 Feb 18;:1-10
Authors: Fernandez-Duque D, Black SE
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.
PMID: 32070200 [PubMed - as supplied by publisher]

Source: Neurocase - February 17, 2020 Category: Neurology Authors: Fernandez-Duque D, Black SE Tags: Neurocase Source Type: research