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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Amplitude of low frequency fluctuations ： ウィキペディア英語版 Amplitude of low frequency fluctuations Amplitude of Low Frequency Fluctuations (ALFF) and fractional Amplitude of Low Frequency Fluctuations (f/ALFF) are neuroimaging methods used to measure spontaneous fluctuations in BOLD-fMRI signal intensity for a given region in the resting brain. Whole-brain ALFF shows greater signal in posterior cingulate, precuneus, and medial prefrontal areas of the default mode network, but also in non-cortical areas near the ventricles, cisterns and large blood vessels. f/ALFF reduces the sensitivity of ALFF to physiological noise by taking the ratio of each frequency (0.01-0.08Hz) to the total frequency range (0-0.25 Hz). Both measures have been investigated as part of reliable biomarkers for many neurological conditions including schizophrenia, ADHD, and major depressive disorder. ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Amplitude of low frequency fluctuations」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.