Visual perception without awareness in a patient with posterior cortical atrophy: impaired explicit but not implicit processing of global information

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Publication Type Journal Article
School or College College of Social & Behavioral Science
Department Psychology
Creator Friedrich, Frances
Other Author Filoteo, J. Vincent; Rabbel, Catherine; Stricker, John L.
Title Visual perception without awareness in a patient with posterior cortical atrophy: impaired explicit but not implicit processing of global information
Date 2002
Description A patient with progressive posterior cortical atrophy (PCA) was examined on several tests of visual cognition. The patient displayed multiple visual cognitive deficits, which included problems identifying degraded stimuli, attending to two or more stimuli simultaneously, recognizing faces, tracing simple visual stimuli, matching simple shapes, and copying objects. The patient was also impaired in identifying visual targets contained at the global level within global-local stimuli (i.e., smaller letters that compose a larger letter). Although the patient denied any conscious awareness of the global form, he nevertheless displayed a normal pattern of global interference when asked to identify local level targets. Thus, the patient processed the global information despite not being consciously aware of such information. These results suggest that global-local processing can take place in the absence of awareness. Possible neurocognitive mechanisms explaining this dissociation are discusse
Type Text
Publisher Cambridge University Press
Subject Posterior cortical atrophy; Global-local processing; Consciousness; Balint's syndrome; Simultanagnoisa
Subject MESH Eye Diseases; Visual Perception; Consciousness
Language eng
Rights Management (c) Cambridge University Press
Format Medium application/pdf
Format Extent 2,517,767 Bytes
Identifier ir-main,
ARK ark:/87278/s61c2fg1
Setname ir_uspace
Date Created 2012-06-13
Date Modified 2021-05-06
ID 706772
Reference URL https://collections.lib.utah.edu/ark:/87278/s61c2fg1
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