Mismatch negativity to pitch change
Varied stimulus proportions in controlling effects of neural refractoriness on human auditory event-related brain potentials
Publication date
2003-05-15
Document type
Forschungsartikel
Author
Organisational unit
Institut für Allgemeine Psychologie, Universität Leipzig
Publisher
Elsevier
Series or journal
Neuroscience letters
ISSN
Periodical volume
344
Periodical issue
2
First page
79
Last page
82
Peer-reviewed
✅
Part of the university bibliography
Nein
Language
English
Keyword
Event-related potential (ERP)
Mismatch negativity
Change detection
Neural refractory states
Cognitive electrophysiology
Abstract
Based on a memory-comparison process, changes in the pitch of repetitive sounds are pre-attentively detected, reflected by the mismatch negativity (MMN) event-related brain potential (ERP). In such oddball sequences, ERP responses are also affected by differential refractory states of frequency-specific afferent cortical neurons. This contamination of MMN can be controlled using an additional blocked sequence of equiprobable tones. The present study investigated effects of varying the in-sequence probabilities of these control tones from 10 to 45%, respectively. Results showed that an equal distribution of all control-sequence tones is not necessary for efficiently removing neural refractoriness effects on the ERPs. The genuine memory-comparison-based frequency-change MMN can be estimated using sequences, within which the number of equiprobable control tones varies between three and nine. (© 2003 Elsevier Science Ireland Ltd. All rights reserved.)
Version
Published version
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