Results 51 to 60 of about 173,658,569 (246)
Frequency-dependent changes in the amplitude of low-frequency fluctuations in patients with Wilson’s disease: a resting-state fMRI study [PDF]
, 2017 To investigate the frequency-dependent changes in the amplitude of low-frequency fluctuations (ALFF) in patients with Wilson's disease (WD). Resting-state function magnetic resonance imaging (R-fMRI) were employed to measure the amplitude of ALFF ...
Yongqiang Yu +10 more
core +1 more source
Scale-free amplitude modulation of low-frequency fluctuations in episodic migraine
Pain, 2019 Abstract Arrhythmic fluctuations in neural activity occur at many levels of the nervous system. Such activity does not have a characteristic temporal periodicity but can exhibit statistical similarities, most commonly power-law scaling behavior, which is indicative of scale-free dynamics.
Duncan J, Hodkinson +3 more
openaire +3 more sources
Long-range, low-frequency acoustic amplitude and phase fluctuations at two frequencies [PDF]
The Journal of the Acoustical Society of America, 1975 Fluctuations of underwater sound at two transmission frequencies an octave apart (220 and 406 Hz) have been observed simultaneously for periods up to eight hours. Transmission was from moored sources to free-drifting hydrophones 260 km distant. The drifting receivers were tracked to within a fraction of a wavelength of the transmission frequency.
R. C. Spindel, R. P. Porter
openaire +1 more source
Brain functional changes in perimenopausal women: an amplitude of low-frequency fluctuation study
Menopause, 2021 Abstract Objective: To evaluate the effects of sex hormones on amplitude of low-frequency fluctuation (ALFF) in brain regions related to cognition in perimenopausal women. Methods: This cross-sectional study involved 25 perimenopausal women and 25 premenopausal women who ...
Liu, Ningning +4 more
openaire +3 more sources
, 2013 Correlation between the amplitude of low-frequency fluctuation (ALFF) of EZ and the abnormal driven effect on it in patients (A) and controls (B).
Han Zhang (110653) +7 more
core +1 more source
Stability of low-frequency fluctuation amplitudes in prolonged resting-state fMRI
NeuroImage, 2014 The (fractional) amplitudes of low-frequency fluctuations (f)ALFF are popular measures for the magnitude of low-frequency oscillations in resting-state fMRI (R-fMRI) data. Both measures can be directly derived from the spectral power of R-fMRI time courses.
Martin Küblböck +7 more
openaire +3 more sources
Frontiers in Human Neuroscience, 2023 ObjectiveResearch on the differences in physiological and psychological mechanisms of practitioners in different occupations is a current hot spot, such as pilots. This study explores the frequency-dependent changes of pilots’ low-frequency amplitudes in
Kaijun Xu +6 more
doaj +1 more source
, 2015 Purpose: To investigate localized cerebral function abnormalities in patients with familial cortical myoclonic tremor and epilepsy (FCMTE) using resting-state functional magnetic resonance imaging (fMRI). Methods: Seven patients with FCMTE from a Chinese
Bin, Yi +8 more
core +1 more source
The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation
FEBS Letters, EarlyView.Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge +6 more
wiley +1 more source
Amplitude-frequency characteristics.
, 2022 Amplitude-frequency characteristics.
Lei Xu (78676) +3 more
core +1 more source