Time-frequency analysis of mismatch negativity in schizophrenia patients in Taiwan

Rong-Long Shiu, Ming H. Hsieh, Yi Li Tseng, Ming Jang Chiu, Chih Min Liu, Fu Shan Jaw, Hai Gwo Hwu

研究成果: 雜誌貢獻文章同行評審


Background: Event-related potentials (ERPs) are currently utilized to study information processing under the influence of neuropsychiatric disorders and are candidate endophenotypes of schizophrenia. However, the traditional ERP approach discards most oscillatory information in the EEG through grand averaging process. This study tried to focus on ERP component of mismatch negativity (MMN) between control and schizophrenia groups in Taiwan. In addition to traditional (grand average) ERP approach, we also compared the time-frequency analysis results of the mismatch negativity. Methods: MMN values were recorded in 55 schizophrenia patients and 42 controls using an auditory oddball paradigm for the duration of the MMN. Besides the traditional grand average approach, the continuous data files were also used for time-frequency analysis via ERP wavelab. Six parameters were explored: event-related spectral perturbation, WTav, avWT, induced activity, intertrial phase coherence and intertrial linear coherence. Results: Traditional ERP approach discovered that group difference occurred in MMN mean amplitude which was compatible with the previous literature. In time-frequency analysis, schizophrenia subjects have lower intertrial phase coherence than controls. Conclusion: Deficit in preattentive sensory information processing, such as MMN, is prominent in Taiwanese schizophrenia subjects. It may also play a role in the basic integrated neural network activity, which could be further explored by time-frequency approach.
頁(從 - 到)287-293
期刊Biomedical Engineering - Applications, Basis and Communications
出版狀態已發佈 - 8月 2011

ASJC Scopus subject areas

  • 生物物理學
  • 生物醫學工程
  • 生物工程


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