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词条 Amplitude of low frequency fluctuations
释义

  1. References

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,[1] 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 (0.01-0.08 Hz) to the total frequency range (0-0.25 Hz).[2] Both measures have been investigated as part of reliable[3] biomarkers for many neurological conditions including schizophrenia,[4][5] and ADHD.[1]

References

1. ^{{Cite journal | pmid = 16919409| date = 2007| author1 = Zang| first1 = Y. F.| title = Altered baseline brain activity in children with ADHD revealed by resting-state functional MRI| journal = Brain and Development| volume = 29| issue = 2| pages = 83–91| last2 = He| first2 = Y| last3 = Zhu| first3 = C. Z.| last4 = Cao| first4 = Q. J.| last5 = Sui| first5 = M. Q.| last6 = Liang| first6 = M| last7 = Tian| first7 = L. X.| last8 = Jiang| first8 = T. Z.| last9 = Wang| first9 = Y. F.| doi = 10.1016/j.braindev.2006.07.002}}
2. ^{{Cite journal | pmid = 3902859| date = 1985| author1 = Wallis| first1 = I| title = Immunolocalization of a neuronal growth-dependent membrane glycoprotein| journal = The Journal of Cell Biology| volume = 101| issue = 5 Pt 1| pages = 1990–8| last2 = Ellis| first2 = L| last3 = Suh| first3 = K| last4 = Pfenninger| first4 = K. H.| pmc = 2113966| doi = 10.1083/jcb.101.5.1990}}
3. ^{{Cite journal | pmid = 2856476| date = 1988| author1 = Tachibana| first1 = M| title = Retinal bipolar cells receive negative feedback input from GABAergic amacrine cells| journal = Visual Neuroscience| volume = 1| issue = 3| pages = 297–305| last2 = Kaneko| first2 = A| doi = 10.1017/S0952523800001954}}
4. ^{{Cite journal |pmid = 2822110|date = 1987|last1 = Böhme|first1 = R|title = A high-affinity plasma membrane Ca2+-ATPase in Dictyostelium discoideum: Its relation to cAMP-induced Ca2+ fluxes|journal = Biochimica et Biophysica Acta|volume = 904|issue = 1|pages = 125–30|first2 = J|last2=Bumann|last3 = Aeckerle|first3 = S|last4 = Malchow|first4 = D|doi = 10.1016/0005-2736(87)90093-9}}
5. ^{{Cite journal | pmid = 3737471| date = 1986| author1 = Kayser| first1 = K| title = Neighborhood analysis of low magnification structures (glands) in healthy, adenomatous, and carcinomatous colon mucosa| journal = Pathology, Research and Practice| volume = 181| issue = 2| pages = 153–8| last2 = Shaver| first2 = M| last3 = Modlinger| first3 = F| last4 = Postl| first4 = K| last5 = Moyers| first5 = J. J.| doi = 10.1016/S0344-0338(86)80004-8}}
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3 : Magnetic resonance imaging|Medical imaging|Neuroscience

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