查詢結果分析
相關文獻
- Comparison of Adaptive Cancellation and Laplacian Operation in Removing Eye Blinking Artifacts in EEG
- 癲癇病人--腦波檢查的臨床意義
- The Calculation of Complexity in Normal and Apoplectic EEG Signals
- 天麻、鉤藤對Kainic Acid誘發癲癇發作老鼠效用之研究
- 坐禪對於腦α波的效應
- The Time Course of Electrophysiological Changes in Rats with Urea-Induced Stimulus Myoclous
- Monitoring EEG Signals for Awareness during Propofol Anaesthesia
- 籃球罰球的腦波心生理學研究
- EEG-A Valuable Tool in Early Diagnosis of Angelman Syndrome
- 新生兒腦波﹣﹣異常波型之探討
頁籤選單縮合
題名 | Comparison of Adaptive Cancellation and Laplacian Operation in Removing Eye Blinking Artifacts in EEG=比較適應消除法和拉式運算法對於消除腦波中眨眼雜訊之效果 |
---|---|
作者 | 林宙晴; 莊舜龍; 朱銘祥; 孫永年; Lin, Chou-ching K.; Chaung, Shun-lung; Ju, Ming-shaung; Sun, Yung-nien; |
期刊 | Journal of Medical and Biological Engineering |
出版日期 | 20040300 |
卷期 | 24:1 2004.03[民93.03] |
頁次 | 頁9-15 |
分類號 | 398.2 |
語文 | eng |
關鍵詞 | 腦波; 適應消除法; 眨眼雜訊; 拉式運算法; EEG; Adaptive cancellation; Eye blinking; Laplacian operation; |
中文摘要 | 本團隊的長程目標是發展給四肢癱瘓患者使用之人腦電腦介面。在此研究中,我們設計-控制變因實驗來比較適應消除法和拉式運算法對於消除腦波中眨眼雜訊之效果。當受測者在三種不同眨眼狀態(持續張眼、持續閉眼和自然眨眼)做拇指動作時紀錄頭表腦波。收集到的腦波訊號,先經過三種前處理(不處理、適應消除法或拉式運算法),再轉換至頻域計算μ波能量。我們擷取動作前後固定時段之平均μ波能量變化作為樣板,然後計算此樣板和每單次動作時相對時段μ波能量變化之相關係數。最後訂定-相關係數閥值來判斷動作發生與否。統計方式則採用變異分析法和卡方檢定法。結果顯示適應消除法和拉式運算法皆可增加μ波能量在運動時之抑制百分比值。對於偵測動作正確率,兩種前處理方式在群組結果上沒有差異,但對於不同個體卻有明顯差異。文中最後討論前處理對於實際偵測動作的效果。 |
英文摘要 | The long-term goal of our project is to develop a brain computer interface for locked-in patients. In this study, we designed a controlled experiment and compared the efficacy of real-time adaptive cancellation and Laplacian operation in removing eye blinking artifacts in EEG. Scalp EEG was recorded while the subject performed thumb movements in three different states of eye blinking, i.e., persisted eye opening, persisted eye closure and natural blinking. The collected data were preprocessed with one of three preprocessing algorithms, namely, adaptive cancellation, Laplacian operation and null and, then, passed through windowed Fourier transform to calculate the change of wave power. Templates of wave power were derived by averaging the whole set. Correlation coefficients of templates and single-pass experimental results were calculated and a threshold value of coefficient was chosen to define the detection of thumb movements. The validity of detection was tested by EMG of thumb extensor. The efficacy of preprocessing algorithms was evaluated by ANOVA and chi-square tests. The results showed that, compared with the control group, both adaptive cancellation and Laplacian operation enhanced the wave suppression percentage. There is no difference between the group results of two preprocessing methods, while the individual difference is prominent. The implication of the effect of preprocessing on enhancing event detection rate is discussed. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。