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Cortical Dipole Imaging of Movement-related Potentials by Means of Parametric Inverse Filters Incorporating with Signal and Noise Covariance
http://hdl.handle.net/10191/25908
http://hdl.handle.net/10191/25908778d0d78-a28c-4fb7-8740-9ec0bc255e9f
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
46_2_242-246.pdf (321.3 kB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2014-02-28 | |||||
| タイトル | ||||||
| タイトル | Cortical Dipole Imaging of Movement-related Potentials by Means of Parametric Inverse Filters Incorporating with Signal and Noise Covariance | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | inverse problem | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | High-resolution EEG | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | cortical dipole imaging | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | parametric Weiner filter | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | signal and noise covariance | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | movement-related potential | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| 著者 |
Hori, J.
× Hori, J.× Miwa, T.× Ohshima, T. |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Objective: The objective of this study is to explore suitable spatial filters for inverse estimation of cortical equivalent dipole layer imaging from the scalp electroencephalogram. We utilize cortical dipole source imaging to locate the possible generators of scalpmeasured movement-related potentials (MRPs) in human. Methods: The effects of incorporating signal and noise covariance into inverse procedures were examined by computer simulations and experimental study. The parametric projection filter (PPF) and parametric Weiner filter (PWF) were applied to an inhomogeneous threesphere head model under various noise conditions. Results: The present simulation results suggest that the PWF incorporating signal information provides better cortical dipole layer imaging results than the PPF and Tikhonov regularization under the condition of moderate and high correlation between signal and noise distributions. On the other hand, the PPF has better performance than other inverse filters under the condition of low correlation between signal and noise distributions. The proposed methods were applied to self-paced MRPs in order to identify the anatomic substrate locations of neural generators. The dipole layer distributions estimated by means of PPF are well-localized as compared with blurred scalp potential maps and dipole layer distribution estimated by Tikhonov regularization. The proposed methods demonstrated that the contralateral premotor cortex was preponderantly activated in relation to movement performance. Conclusions: In cortical dipole source imaging, the PWF has better performance especially when the correlation between the signal and noise is high. The proposed inverse method was applicable to human experiments of MRPs if the signal and noise covariances were obtained. | |||||
| 言語 | en | |||||
| 書誌情報 |
en : Methods of Information in Medicine 巻 46, 号 2, p. 242-246, 発行日 2007 |
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| 出版者 | ||||||
| 出版者 | Schattauer | |||||
| 言語 | en | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0026-1270 | |||||
| 書誌レコードID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AA00737631 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | http://doi.org/10.1055/s-0038-1625415 | |||||
| 出版タイプ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| 著者版フラグ | ||||||
| 値 | publisher | |||||
