Visual MMN and automatic registration of large-scale regularities
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1
Japan Society for the Promotion of Science, Japan
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2
Department of Psychology, Nagoya University, Japan
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3
Institute of Psychology I, University of Leipzig, Germany
Visual MMN is an ERP correlate of memory mismatch processes in the visual system that has been typically observed in response to infrequent deviant stimuli randomly inserted among frequent standard stimuli in the visual oddball sequence. It has been shown that the memory representation underlying visual MMN generation registers not only a sensory memory trace of standard stimuli, but also sequential regularities extracted from the preceding standard stimulus sequence (i.e., repetition of standard stimuli). The purpose of the present study was to investigate how large a scale of regularity can be automatically registered in the memory representation. For this purpose, we applied the paradigm of Sussman et al. (1998, 2005) and compared visual MMN elicited by infrequent deviant stimuli (20%, low-luminance stimuli) inserted among frequent standard stimuli (80%, high-luminance stimuli) in fixed (i.e., SSSSDSSSSD…) and randomized manners (SSSDSSSSSD…) at three different stimulus onset asynchronies (SOAs, 160, 480, and 800 ms) in separate blocks. It was hypothesized that if the large-scale regularity of five stimuli (i.e., SSSSD) is registered in the memory representation, then visual MMN in the fixed sequence would be reduced compared to that in the randomized sequence. In contrast, if the large-scale regularity is not registered and only the sensory memory trace of standard stimuli or the small-scale regularity (i.e., repetition of standard stimuli) is registered in the memory representation, then visual MMN in the fixed sequence would not differ from that in the randomized sequence. Results showed that at the 160-ms SOA, visual MMN in the fixed sequence was reduced compared to that in the randomized sequence, while at the 480- and 800-ms SOAs, visual MMN did not differ between the fixed and randomized sequences. These results imply that at the 160-ms SOA, the large-scale regularity of five stimuli was registered in the memory representation, while at the 480- and 800-ms SOAs, the large-scale regularity was not registered in the memory representation. These results suggest that within a limitation of the temporal proximity of stimulus presentation affecting the perceptual organization of the successive stimuli or the duration of memory representation, a large-scale regularity embedded in successive visual stimuli can be automatically registered at the level of the visual system.
Conference:
MMN 09
Fifth Conference on Mismatch Negativity (MMN) and its Clinical and Scientific Applications, Budapest, Hungary, 4 Apr - 7 Apr, 2009.
Presentation Type:
Poster Presentation
Topic:
Poster Presentations
Citation:
Kimura
M,
Widmann
A and
Schröger
E
(2009). Visual MMN and automatic registration of large-scale regularities.
Conference Abstract:
MMN 09
Fifth Conference on Mismatch Negativity (MMN) and its Clinical and Scientific Applications.
doi: 10.3389/conf.neuro.09.2009.05.049
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Received:
24 Mar 2009;
Published Online:
24 Mar 2009.
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Correspondence:
Motohiro Kimura, Japan Society for the Promotion of Science, Tokyo, Japan, m-kimura@nagoya-u.jp