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Common mechanisms of visual imagery and perception


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Ishai, A; Sagi, D (1995). Common mechanisms of visual imagery and perception. Sciene, 268(5218):1772-1774.

Abstract

Detection of a visual target can be facilitated by flanking visual masks. A similar enhancement in detection thresholds was obtained when observers imagined the previously perceived masks. Imagery-induced facilitation was detected for as long as 5 minutes after observation of the masks by the targeted eye. These results indicated the existence of a low-level (monocular) memory that stores the sensory trace for several minutes and enables reactivation of early representations by higher processes. This memory, with its iconic nature, may subserve the interface between mental images and percepts.

Abstract

Detection of a visual target can be facilitated by flanking visual masks. A similar enhancement in detection thresholds was obtained when observers imagined the previously perceived masks. Imagery-induced facilitation was detected for as long as 5 minutes after observation of the masks by the targeted eye. These results indicated the existence of a low-level (monocular) memory that stores the sensory trace for several minutes and enables reactivation of early representations by higher processes. This memory, with its iconic nature, may subserve the interface between mental images and percepts.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Clinic for Neuroradiology
Dewey Decimal Classification:610 Medicine & health
Language:English
Date:1995
Deposited On:13 Mar 2009 08:44
Last Modified:06 Dec 2017 14:09
Publisher:American Association for the Advancement of Science (AAAS)
ISSN:0036-8075
Publisher DOI:https://doi.org/10.1126/science.7792605
PubMed ID:7792605

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