Results 251 to 260 of about 173,689,056 (279)

Searchlight classification based on Amplitude of Low Frequency Fluctuation and functional connectivity in individuals with obsessive-compulsive symptoms

Cognitive Neuropsychiatry, 2019
Introduction: Investigating obsessive-compulsive symptoms in subclinical populations provides a useful framework for understanding the early development of obsessive-compulsive spectrum disorders.
Rui-Ting Zhang, Yi Wang, Kristoffer Hougaard Madsen   +2 more
exaly   +2 more sources

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Endless Fluctuations: Temporal Dynamics of the Amplitude of Low Frequency Fluctuations

IEEE Transactions on Medical Imaging, 2019
Intrinsic neural activity ubiquitously persists in all physiological states. However, how intrinsic brain activity (iBA) changes over a short time remains unknown. To uncover the brain dynamics' theoretic underpinning, electrophysiological relevance, and neuromodulation, we identified iBA dynamics on simulated data, electroencephalogram-functional ...
Liyuan Li, Wei Liao, Xujun Duan
exaly   +4 more sources

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.
Toby B. Cumming, Amy Brodtmann, Natalia Egorova   +2 more
exaly   +5 more sources

Abnormal fractional Amplitude of Low-Frequency Fluctuation in chronic ketamine users

Psychiatry Research: Neuroimaging, 2022
Ketamine has become a major substance of abuse worldwide. Nevertheless, The long-term effects of ketamine use on intrinsic spontaneous neural activity remain unknown.In the present study, rs-fMRI was used to explore whether chronic ketamine use changes the intrinsic spontaneous neural activity, and whether the intrinsic spontaneous neural activity ...
Jun, Zhong, Huawang, Wu, Fengchun, Wu, Hongbo, He, Zhaohua, Zhang, Jiaxin, Huang, Penghui, Cao, Ni, Fan   +7 more
openaire   +2 more sources

On the loudness of low-frequency sounds with fluctuating amplitudes

The Journal of the Acoustical Society of America, 2019
Some environmental sounds have strong amplitude fluctuations that may affect their perceived loudness and annoyance. This study assessed the effect of beat rate (fb) and center frequency (fc) on the loudness of low-frequency beating tones. The loudness of two-tone complexes (TTCs) with fc = 40, 63, 80, and 1000 Hz was matched with that of unmodulated ...
Carlos, Jurado, Darío, Gordillo, Brian C J, Moore   +2 more
openaire   +2 more sources

Alterations of the amplitude of low-frequency fluctuations in anxiety in Parkinson’s disease

Neuroscience Letters, 2018
Anxiety disorders are very common in Parkinson's disease (PD), but neural mechanisms underlying these symptoms still remain elusive. In the present study, we aim to investigate the neural substrates in anxiety disorders in PD.The present study comprised 48 PD patients and 19 healthy subjects. According to a Hamilton Anxiety Rating Scale cutoff score of
Xixi, Wang, Junyi, Li, Min, Wang, Yongsheng, Yuan, Lin, Zhu, Yuting, Shen, Hui, Zhang, Kezhong, Zhang   +7 more
openaire   +2 more sources

Frequency-dependent amplitude alterations of resting-state spontaneous fluctuations in idiopathic generalized epilepsy

Epilepsy Research, 2014
Purpose: Amplitude of low-frequency fluctuation (ALFF) of blood-oxygenation level-dependent (BOLD) has proven a promising way to detect disease-related local brain activity.
Jianfeng Feng, Wei Liao, Qiang Xu
exaly   +2 more sources

Effect of amplitude fluctuations on the loudness of low-frequency sounds

The Journal of the Acoustical Society of America, 2019
The loudness of two-tone complexes (TTCs) with center frequencies (fc) of 40, 63, 80, and 1000 Hz was matched with that of unmodulated tones (UTs). Frequency differences between the TTC components, corresponding to beat frequencies, fb, were 1, 2, 5, and 12 Hz.
Carlos Jurado, Darío Gordillo, Brian C. Moore   +2 more
openaire   +1 more source

Amplitude of low-frequency fluctuations in bipolar disorder: A resting state fMRI study

Journal of Affective Disorders, 2014
The spontaneous low frequency fluctuations (LFF) of blood oxygenation level-dependent (BOLD) signal in resting state have been identified as a biological measure of baseline spontaneous activity in the brain. Increasingly, studies of spontaneous resting state functional connectivity have demonstrated neural network abnormalities in bipolar disorder (BD)
Ke Xu, Guoguang Fan, Yanqing Tang
exaly   +3 more sources

Fractional amplitude of low-frequency fluctuations is disrupted in Alzheimer’s disease with depression

Clinical Neurophysiology, 2017
To explore brain activity in AD with depression (D-AD) based on fractional amplitude of low-frequency fluctuation (fALFF).Twenty-two D-AD and 21 AD without depression patients (nD-AD) were examined by magnetic resonance imaging during resting state. Neuropsychiatric Inventory and Hamilton Depression Rating Scale were employed to assess the severity of ...
Zhongwei, Guo, Xiaozheng, Liu, Jiapeng, Li, Fuquan, Wei, Hongtao, Hou, Xingli, Chen, Xinwei, Li, Wei, Chen   +7 more
openaire   +2 more sources