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This topic has appeared in the trending rankings 1 time(s) in the past year. While it does not trend frequently, its appearance suggests a renewed or concentrated surge of public interest.
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Amplitude_of_low_frequency_fluctuations entered the ranking for the first time today at position #. This is its highest position ever recorded.
This topic has appeared in the English Wikipedia rankings 1 time. It first appeared on 2026-06-09 and was most recently seen on 2026-06-09.
Amplitude of low-frequency fluctuations (ALFF) and fractional ALFF (fALFF) are resting-state functional MRI (rs-fMRI) metrics that quantify the power of spontaneous, low-frequency fluctuations of the BOLD signal within a voxel or region of interest. ALFF measures the square root of the power spectrum within a predefined low-frequency band. The exact upper cutoff depends on the sampling rate and must be below the Nyquist frequency. fALFF is the ratio of power within that low-frequency band to the total power across a broader band, which reduces nonspecific physiological noise relative to ALFF.
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