長波変動磁界による末梢神経刺激効果の基礎的検討

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2013/06/01

タイトル(英語): Fundamental Study on Peripheral Nerve Stimulation with LF Time-Varying Magnetic Field

著者名: 早見　武人（岡山大学大学院自然科学研究科），伊良皆　啓治（九州大学大学院システム情報科学研究院）

著者名(英語): Takehito Hayami (Graduate School of Natural Science and Technology, Okayama University), Keiji Iramina (Graduate School of Information Science and Electrical Engineering, Kyushu University)

キーワード: 磁気刺激，神経刺激，ケーブル理論，活動電位，人体モデル　　magnetic stimulation，nerve stimulation，cable theory，action potential，human model

要約(英語): Numerical simulation of human and xenopus myelinated nerve magnetic stimulation was executed to compare their excitation thresholds at Low Frequency (LF) band. Currently LF band magnetic field exposure is suppressed during Magnetic Resonance (MR) scanning to avoid possible unexpected sensation and motion, which limits the resolution of MR images. Recently, Weinberg and his colleague reported higher threshold of human peripheral nerve against magnetic field at LF band in their experimental study. Using equvalent circuits of human and xenopus myelinated nerves, their thresholds for LF magnetic field stiumulation were investigated. As a result, the excitation threshold of human nerve for LF magnetic field stimulation with biphasic cosine wave increased exponentially around 100kHz as the frequency increased, which is consistent with the finding of Weinberg et al. and was not observed in xenopus nerve equivalent circuit. The lower axoplasm resistivity of human nerve was considered to be the cause of this feature.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.133 No.6 （2013） 特集：磁気を用いた医療・医用応用技術

本誌掲載ページ: 351-355 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/133/6/133_351/_article/-char/ja/