頁籤選單縮合
題名 | Influence of Passive Thumb Movements on μ Wave=被動式拇指運動對於μ波的影響 |
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作者 | 林宙晴; 朱銘祥; 黃志旭; | 書刊名 | Journal of Medical and Biological Engineering |
卷期 | 23:1 2003.03[民92.03] |
頁次 | 頁37-43 |
分類號 | 346.679 |
關鍵詞 | μ波; 被動運動; 人腦電腦介面; μ wave; Passive movement; Brain computer interface; |
語文 | 英文(English) |
中文摘要 | μ波是一種自發於羅藍氏區(Rolandic area)約10Hz的腦波波形,且已知會因自主運動而抑制。本研究目的為驗證μ波是否也受被動運動所引起的感覺輸入而抑制。研究中以自製的機構帶動右手拇指產生5Hz與10Hz的感覺刺激輸入,然後記錄三位受測者的腦波訊號作分析。16個頻道的腦波電極分佈於頭皮中央區兩側,以數位腦波機256Hz取樣後加以記錄儲存。本研究採用兩種時間-頻率的訊號處理方法:快速區段傅利葉轉換與小波分解。兩種方法都顯示在被動運動期間μ波出現抑制的現象。 |
英文摘要 | μ wave is the spontaneous EEG activity around 10Hz originating from Rolandic area and is suppressed by voluntary movements. The current study was designed to test whether μ wave was also suppressed by passive movements. The passive movements of right thumb (driven by a custom-made mechanism) of two different frequencies, namely, 5 and 10 Hz, were used as the sensory inputs. Sixteen channels of EEG signals in bilateral central area were recorded with a digital EEG machine with a sampling rate of 256 Hz. Two time-frequency signal processing methods, short time Fourier Transform and wavelet decomposition were employed to analyze the data. Three normal subjects were recruited. The results of both short time Fourier Transform and wavelet decomposition analyses indicated that μ wave on the contralateral somatosensory area was suppressed during passive movements. |
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