Aktiviteetti: Puhe- tai esitystyypit › Kutsuesitelmä
The MMN and P3a as objective markers of auditory skills in CI users
Dr. Ritva Torppa and professor Teija Kujala
Department of psychology and logopedics, Cognitive Brain Research Unit,
Faculty of Medicine, University of Helsinki, Finland
The mismatch negativity (MMN) and P3a are event-related potentials (ERP) recorded with electroencephalography. They reflect discrimination of and attention shift towards sound features such as phonemes, pitch, timbre, intensity, or duration. Their measurement can be carried out even in the absence of attention and behavioral responses. Many research groups use nowadays so-called multi-feature paradigms which allow measurement of MMN and P3a to changes in several (5-6) sound features and magnitudes (e.g., 3) in a short time (e.g., 30 minutes).
We studied with a multi-feature paradigm the development of cortical processing of music in 4-13 years old children with CIs and the connections of their MMN and P3a to perception of speech in noise. We found that compared to other CI children, the children with CIs who sing regularly develop better in the attention-related P3a responses and are better in perception of speech in noise, and that in CI children this skill is connected to the MMN and P3a elicited by changes in timbre. Other researchers have studied successfully, for example, in recently-implanted infants the development of MMN to changes in vowel duration and word stress, and in adult CI users the development of MMN to changes in speech and music. This presentation will give a short overview of the studies on MMN and P3a in CI users and methodological issues related to them.
Näätänen, R., Petersen, B, Torppa, R., Lonka, E., & Vuust, P. (2017). The MMN as a viable and objective marker of auditory development in CI users. Hearing Research, 353, 57-75.
Torppa, R., Faulkner, A., Kujala, T., Huotilainen, M. & Lipsanen, J. (in print). Developmental links between speech perception in noise, singing, and cortical processing of music in children with cochlear implants. Music Perception.
20 lokakuuta 2018
IAPA 2018 (International Association of Physicians in Audio-Vestibular Medicine) Conference