Results 41 to 50 of about 29,731 (231)

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, Michael Woletz, Anna Höflich, Ronald Sladky, Georg S. Kranz, André Hoffmann, Rupert Lanzenberger, Christian Windischberger   +7 more
openaire   +2 more sources

Large Amplitude, Low Frequency Plasma Fluctuations at Comet Giacobini-Zinner

Geophysical Research Letters, 1986
Very large amplitude fluctuations in electron density, temperature, and flow velocity were a prominent aspect of the solar wind interaction with comet Giacobini‐Zinner during the ICE encounter in September 1985. These fluctuations were detected at a distance of at least 9 × 105 km and grew in amplitude as ICE approached the comet, peaking in amplitude ...
J. T. Gosling, J. R. Asbridge, S. J. Bame, M. F. Thomsen, R. D. Zwickl   +4 more
openaire   +1 more source

Response analysis of 3D braided two-stage gear system excited by different frequency signals

Advances in Mechanical Engineering, 2021
The knitting principle of 3D braided gear was studied, and the dynamic model of the two-stage gear system was established. The fourth-order Runge-Kutta method was used to numerically simulate the dynamic characteristics of common gear and 3D braided gear.
Weiliang Zhang, Xupeng Wang, Xiaomin Ji, Xinyao Tang, Fengfeng Liu, Shuwei Liu, Tengyuan Xue   +6 more
doaj   +1 more source

Altered Spontaneous Brain Activity Patterns in Children With Strabismic Amblyopia After Low-Frequency Repetitive Transcranial Magnetic Stimulation: A Resting-State Functional Magnetic Resonance Imaging Study

Frontiers in Human Neuroscience, 2022
ObjectivePrevious studies have demonstrated altered brain activity in strabismic amblyopia (SA). In this study, low-frequency repetitive transcranial magnetic stimulation (rTMS) was applied in children with strabismic amblyopia after they had undergone ...
Yi-Ning Wang, Yi-Cong Pan, Hui-Ye Shu, Li-Juan Zhang, Qiu-Yu Li, Qian-Min Ge, Rong-Bin Liang, Yi Shao   +7 more
doaj   +1 more source

Dynamic alterations of amplitude of low-frequency fluctuations in patients with chronic neck pain

Psychoradiology, 2021
Abstract Background The pathogenesis of neck pain in the brain, which is the fourth most common cause of disability, remains unclear. Furthermore, little is known about the characteristics of dynamic local functional brain activity in cervical pain ...
Zhang, Jiabao, Xu, Tao, Wang, Linjia, Chen, Dan, Gong, Lisha, Chen, Huafu, Yu, Jiali, Zhao, Ling, Gao, Qing   +8 more
openaire   +2 more sources

Research on brain functions related to visual information processing and body coordination function of pilots based on the low-frequency amplitude method

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, Rui Liu, Xipeng Chen, Xi Chen, Yong Yang, Quanchuan Wang, Jiazhong Yang   +6 more
doaj   +1 more source

An unexpected alternative viologen electron mediator site in tungsten‐containing formate dehydrogenase

FEBS Letters, EarlyView.
An unexpected alternative interaction site for ethyl viologen was identified in formate dehydrogenase 1 from Methylorubrum extorquens. Combined mutagenesis, kinetic analysis, and docking revealed that aromatic residues near an iron–sulfur cluster enable flavin mononucleotide‐independent electron transfer, offering a framework for engineering improved ...
Eleni G. Poloniataki, Yong Hwan Kim
wiley   +1 more source

Fractional amplitude of low-frequency fluctuations (fALFF) in post-stroke depression

NeuroImage: Clinical, 2017
Depression is a common outcome following stroke, associated with reduced quality of life and poorer recovery. Despite attempts to associate depression symptoms with specific lesion sites, the neural basis of post-stroke depression remains poorly understood.
Natalia Egorova, Michele Veldsman, Toby Cumming, Amy Brodtmann   +3 more
openaire   +4 more sources

Reliability of the amplitude of low-frequency fluctuations in resting state fMRI in chronic schizophrenia [PDF]

Psychiatry Research: Neuroimaging, 2012
The resting state amplitude of low frequency fluctuations (ALFF) in functional magnetic resonance imaging has been shown to be reliable in healthy subjects, and to correlate with antipsychotic treatment response in antipsychotic-naïve schizophrenia patients.
Jessica A, Turner, Hongji, Chen, Daniel H, Mathalon, Elena A, Allen, Andrew R, Mayer, Christopher C, Abbott, Vince D, Calhoun, Juan, Bustillo   +7 more
openaire   +2 more sources

Changes in white matter predict efficacy of repetitive transcranial magnetic stimulation in Parkinson's disease

NeuroImage
Background: The efficacy of continuous theta burst stimulation (cTBS) in Parkinson's disease (PD) exhibits considerable variability. Emerging evidence links changes in brain white matter (WM) activity to the onset and progression of PD, offering novel ...
Jinying Han, Lingling Lv, Xin Chen, Mengqi Wang, Lili Hu, Fengbo Xing, Pingping Liu, Liuzhenxiong Yu, Ziye Zhao, Jinmei Sun, Tingting Liu, Jingjing Cheng, Minhao Zhu, Manman Gao, Gongjun Ji, Rong Ye, Kai Wang, Panpan Hu   +17 more
doaj   +1 more source