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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
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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
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Abnormal fractional Amplitude of Low-Frequency Fluctuation in chronic ketamine users
Psychiatry Research: Neuroimaging, 2022Ketamine 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 +7 more
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On the loudness of low-frequency sounds with fluctuating amplitudes
The Journal of the Acoustical Society of America, 2019Some 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 +2 more
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Alterations of the amplitude of low-frequency fluctuations in anxiety in Parkinson’s disease
Neuroscience Letters, 2018Anxiety 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 +7 more
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Effect of amplitude fluctuations on the loudness of low-frequency sounds
The Journal of the Acoustical Society of America, 2019The 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 +2 more
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Amplitude of low-frequency fluctuations in bipolar disorder: A resting state fMRI study
Journal of Affective Disorders, 2014The 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
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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 +7 more
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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 +7 more
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The Fourth International Symposium on Image Computing and Digital Medicine, 2020
Numerous studies showed autism spectrum disorder (ASD) is a socio-cognitive and neurodevelopmental disorder together with disturbed static brain activity. However, little is known about alterations of dynamic brain activity and its associations with social behavior in ASD.
Changchun He +5 more
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Numerous studies showed autism spectrum disorder (ASD) is a socio-cognitive and neurodevelopmental disorder together with disturbed static brain activity. However, little is known about alterations of dynamic brain activity and its associations with social behavior in ASD.
Changchun He +5 more
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Fractional amplitude of low-frequency fluctuations of BOLD signal in schizophrenia
2015 23rd Iranian Conference on Electrical Engineering, 2015Over 1% of the world population suffer from schizophrenia, which is a mental and hereditary disorder. Diagnosis of this disorder is now based mainly on the clinical symptoms. As the first study in Iran, we used magnetic resonance imaging (MRI) technique to study biomarkers of schizophrenia that are detectable in resting state functional MRI (fMRI).
Afsoon Khodaee +2 more
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