The brain uses single-trial multisensory memories to discriminate without awareness.

Details

Serval ID
serval:BIB_75E25C354AAA
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
The brain uses single-trial multisensory memories to discriminate without awareness.
Journal
NeuroImage
Author(s)
Murray M.M., Foxe J.J., Wylie G.R.
ISSN
1053-8119
Publication state
Published
Issued date
2005
Peer-reviewed
Oui
Volume
27
Number
2
Pages
473-8
Language
english
Notes
Publication types: Clinical Trial ; Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, P.H.S. - Publication Status: ppublish
Abstract
Multisensory experiences enhance perceptions and facilitate memory retrieval processes, even when only unisensory information is available for accessing such memories. Using fMRI, we identified human brain regions involved in discriminating visual stimuli according to past multisensory vs. unisensory experiences. Subjects performed a completely orthogonal task, discriminating repeated from initial image presentations intermixed within a continuous recognition task. Half of initial presentations were multisensory, and all repetitions were exclusively visual. Despite only single-trial exposures to initial image presentations, accuracy in indicating image repetitions was significantly improved by past auditory-visual multisensory experiences over images only encountered visually. Similarly, regions within the lateral-occipital complex-areas typically associated with visual object recognition processes-were more active to visual stimuli with multisensory than unisensory pasts. Additional differential responses were observed in the anterior cingulate and frontal cortices. Multisensory experiences are registered by the brain even when of no immediate behavioral relevance and can be used to categorize memories. These data reveal the functional efficacy of multisensory processing.
Keywords
Acoustic Stimulation, Adolescent, Adult, Auditory Perception, Awareness, Brain, Cerebrovascular Circulation, Cluster Analysis, Discrimination (Psychology), Female, Humans, Male, Oxygen, Photic Stimulation, Psychomotor Performance, Visual Perception
Pubmed
Web of science
Create date
21/01/2008 10:23
Last modification date
20/08/2019 14:33
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