The MMN as an indicator for the functionality of auditory speech perception
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1
Institute for Psychology, Humboldt University of Berlin, Germany
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2
Institute for German Language and Linguistics, Humboldt University of Berlin, Germany
The aim of the present study was to investigate the sensitivity of the MMN for differences in central information characteristics between acoustic and phonetic speech perception. The experimental task has been evaluated in view of a further study which will investigate the circadian variation in the functionality of auditory speech perception, especially of acoustic and phonetic perception, under 40 hours of sleep deprivation. The EEG was recorded from fifteen volunteers during an auditory passive oddball task with an acoustic compared to a phonetic test condition. Tones with 400 Hz (standard) and tones with 800 Hz (deviant) were used as acoustic stimuli. Phonetic stimuli consisted of consonant-vocal syllables with a strong categorical perception contrast. During the presentation of auditory stimuli binaurally over headphones subjects performed a picture-counting distraction task. The results showed both a significant acoustic MMN and a significant phonetic MMN, however, differences in amplitude and latency were observed between the two components. The phonetic MMN was significantly smaller in amplitude compared to the acoustic MMN, and peak latency for the phonetic MMN was significantly later than for the acoustic MMN. These results are interpreted as reflecting higher cognitive demand in central information processing for the phonetic MMN compared to the acoustic MMN. In a further study, the circadian variation of phonetic as well as acoustic MMN and their temporal connectivity will be evaluated.
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:
Pusch
K,
Sommer
W and
Dietrich
R
(2009). The MMN as an indicator for the functionality of auditory speech perception.
Conference Abstract:
MMN 09
Fifth Conference on Mismatch Negativity (MMN) and its Clinical and Scientific Applications.
doi: 10.3389/conf.neuro.09.2009.05.108
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Received:
26 Mar 2009;
Published Online:
26 Mar 2009.
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Correspondence:
Kathrin Pusch, Institute for Psychology, Humboldt University of Berlin, 82152 Planegg-Martinsried, Germany, kathrin.pusch@psychologie.hu-berlin.de