Mismatch negativity for speech sounds in temporal lobe epilepsy

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• 作者：Keiko Hara^a ; ^b ; ^{hrkeiko.bi@tmd.ac.jp} ; Katsuya Ohta^a ; ^c ; ^d ; Miho Miyajima^c ; Minoru Hara^b ; Hiroko Iino^a ; ^f ; Ayasa Matsuda^a ; ^c ; Satsuki Watanabe^c ; Eisuke Matsushima^c ; Taketoshi Maehara^e ; Masato Matsuura^a
• 关键词：Temporal lobe epilepsy (TLE) ; Event-related potentials (ERPs) ; Mismatch negativity (MMN) ; Phonetic sounds ; Vowel ; Auditory processing ; Pre-attentive memory ; MMN generators
• 刊名：Epilepsy & Behavior
• 出版年：2012
• 期刊代码：76_15255050
• 类别：neu
• 出版时间：March, 2012
• 卷：23
• 期：3
• 页码：335-341
• 文件大小：335 K

摘要

The mismatch negativity (MMN) is an electrophysiological trace of change detection, measured by electroencephalography (EEG), and is a reliable marker for pre-attentive auditory sensory memory. We used a phonetic oddball paradigm in patients with temporal lobe epilepsy (TLE) to elicit the MMN response at fronto-central sites and the mismatch positivity (MMP) response at mastoid sites. The MMN in 26 patients was compared with that of 26 age- and gender-matched healthy control participants. Electroencephalography responses were recorded during the presentation of speech sounds: the vowels 鈥榓鈥?and 鈥榦鈥?in alternation. Average waveforms were obtained for standard and deviant trials. We found that the MMP response at bilateral mastoid sites was reduced, whereas the MMN response at fronto-central sites did not change significantly. These results support the view that the MMN is generated by separable sources in the frontal and temporal lobes and that these sources are differentially affected by TLE.