English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Top-down predictability cues drive cross-modal anticipatory effects on mismatch negativity latency

Tavano, A., Schwartze, M., Schröger, E., & Kotz, S. A. (2011). Top-down predictability cues drive cross-modal anticipatory effects on mismatch negativity latency. Poster presented at ICON - XI International Conference on Cognitive Neuroscience, Palma, Spain.

Item is

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Tavano, Alessandro1, Author
Schwartze, Michael2, Author              
Schröger, Erich1, Author
Kotz, Sonja A.2, Author              
Affiliations:
1BioCog - Cognitive incl. Biological Psychology, Institute of Psychology, University of Leipzig, ou_634560              
2Minerva Research Group Neurocognition of Rhythm in Communication, MPI for Human Cognitive and Brain Sciences, Leipzig, ou_persistent22              

Content

show
hide
Free keywords: -
 Abstract: Infrequent deviant sounds appearing in a repeated, ordered sequence of standard sounds elicit the Mismatch Negativity (MMN) event-related component - indexing regularity violation - if the Inter Stimulus Interval (ISI) is long enough to avoid perceptual grouping and subjects are unaware of the sequential pattern. When pattern structure is explicitly provided, MMN is greatly reduced in amplitude, suggesting that top-down grouping prevented regularity violation detection. However, at short ISIs stimulus-driven, rhythmical structure perception is thought to override the effects of top-down predictability cues. We tested this hypothesis using sequences of ordered five 50-ms sine tones, the first four being standard tones (440 Hz), and the last a frequency deviant tone (494 Hz). Two blocked ISI conditions were used: 700 ms and 200 ms. The EEG of 30 participants was recorded while they detected rare (5%) lower frequency target tones (349 Hz). Top-down pattern information was provided off-line by means of static visual pictures. Results for the 700-ms ISI blocks showed a significant reduction in the MMN amplitude in the informed condition. As for the 200-ms ISI blocks, while no differences in MMN amplitude were found comparing informed and non-informed conditions at frontal sites, a significant anticipatory effect on the latency of the MMN was found at temporo-parietal electrode-sites in the informed condition, showing that top-down predictability cues were not fully overridden by rhythmical pattern perception. Furthermore, the building-up of N1 deviant activity in the informed condition started at occipital sites and gradually moved to frontal sites, suggesting a cross-modal effect of static visual predictability cues held in working memory on auditory processing.

Details

show
hide
Language(s):
 Dates: 2011-09
 Publication Status: Not specified
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: -
 Degree: -

Event

show
hide
Title: ICON - XI International Conference on Cognitive Neuroscience
Place of Event: Palma, Spain
Start-/End Date: 2011-09-25 - 2011-09-29

Legal Case

show

Project information

show

Source

show