The involvement of centralized and distributed processes in sub-second time interval adaptation: an ERP investigation of apparent motion
Date
2017Source Title
European Journal of Neuroscience
Print ISSN
0953-816X
Publisher
Blackwell Publishing Ltd
Volume
46
Issue
8
Pages
2325 - 2338
Language
English
Type
ArticleItem Usage Stats
250
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views
309
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downloads
Abstract
Accumulating evidence suggests that the timing of brief stationary sounds affects visual motion perception. Recent studies have shown that auditory time interval can alter apparent motion perception not only through concurrent stimulation but also through brief adaptation. The adaptation after-effects for auditory time intervals was found to be similar to those for visual time intervals, suggesting the involvement of a central timing mechanism. To understand the nature of cortical processes underlying such after-effects, we adapted observers to different time intervals using either brief sounds or visual flashes and examined the evoked activity to the subsequently presented visual apparent motion. Both auditory and visual time interval adaptation led to significant changes in the ERPs elicited by the apparent motion. However, the changes induced by each modality were in the opposite direction. Also, they mainly occurred in different time windows and clustered over distinct scalp sites. The effects of auditory time interval adaptation were centred over parietal and parieto-central electrodes while the visual adaptation effects were mostly over occipital and parieto-occipital regions. Moreover, the changes were much more salient when sounds were used during the adaptation phase. Taken together, our findings within the context of visual motion point to auditory dominance in the temporal domain and highlight the distinct nature of the sensory processes involved in auditory and visual time interval adaptation. © 2017 Federation of European Neuroscience Societies and John Wiley & Sons Ltd
Keywords
Apparent motionAuditory adaptation
Event-related potentials
Sub-second time intervals
Visual adaptation
Adaptation
Adult
Apparent motion perception
Auditory lateralization
Controlled study
Event related potential
Human
Human experiment
Movement perception
Normal human
Occipital cortex
Priority journal
Scalp
Sound
Time perception
Vision
Visual adaptation
Permalink
http://hdl.handle.net/11693/37089Published Version (Please cite this version)
http://dx.doi.org/10.1111/ejn.13691Collections
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