Results 1 to 10 of about 5,159 (117)
Frontiers in Neuroscience, 2018 Background: Alzheimer’s disease (AD) is a common neurodegenerative disease in which the brain undergoes alterations for decades before symptoms become obvious.
Tian-Yi Yan, Liu Yang, Piu Chan
exaly +3 more sources
Reduced amplitude of low frequency fluctuation in the sensorimotor cortex in early psychosis: association with motor dexterity and hyperconnectivity [PDF]
SchizophreniaPrevious studies have demonstrated widespread regional abnormalities in blood oxygen level-dependent (BOLD) amplitude of low frequency fluctuation (ALFF) in psychotic disorders.
Jason Smucny +3 more
doaj +2 more sources
Static and dynamic alterations in the amplitude of low-frequency fluctuation in patients with amyotrophic lateral sclerosis [PDF]
PeerJ, 2020 Background Static changes in local brain activity in patients suffering from amyotrophic lateral sclerosis (ALS) have been studied. However, the dynamic characteristics of local brain activity are poorly understood.
Xujing Ma +8 more
doaj +2 more sources
NeuroImage: Clinical, 2023 Background: Post-stroke depression (PSD) is one of the most frequent psychiatric disorders after stroke. However, the underlying brain mechanism of PSD remains unclarified.
Xiumei Wu +10 more
doaj +1 more source
Brain Sciences, 2021 The goal of this paper is to investigate the baseline brain activity in euthymic bipolar disorder (BD) patients by comparing it to healthy controls (HC) with the use of a variety of resting state functional magnetic resonance imaging (rs-fMRI) analyses ...
Adrian Andrzej Chrobak +11 more
doaj +1 more source
Disturbed neurovascular coupling in hemodialysis patients [PDF]
PeerJ, 2020 Background Altered cerebral blood flow (CBF) and amplitude of low-frequency fluctuation (ALFF) have been reported in hemodialysis patients. However, neurovascular coupling impairments, which provide a novel insight into the human brain, have not been ...
Mei Jin +13 more
doaj +2 more sources
NeuroImage: Clinical, 2023 Background: This study aims to investigate the altered spontaneous neural activity in patients with Parkinson's disease (PD) revealed by amplitudes of low-frequency fluctuations (ALFF) of resting-state fMRI, and the feasibility of using ALFF as ...
Bowen Yang +13 more
doaj +1 more source
Abnormal intrinsic brain activity patterns in patients with subcortical ischemic vascular dementia. [PDF]
PLoS ONE, 2014 OBJECTIVES: To investigate the amplitude of low-frequency fluctuations (ALFF) alteration of whole brain in patients with subcortical ischemic vascular dementia (SIVD). MATERIALS AND METHODS: Thirty patients with SIVD and 35 control subjects were included
Chen Liu +6 more
doaj +1 more source
Higher Sensitivity and Reproducibility of Wavelet-Based Amplitude of Resting-State fMRI
Frontiers in Neuroscience, 2020 The fast Fourier transform (FFT) is a widely used algorithm used to depict the amplitude of low-frequency fluctuation (ALFF) of resting-state functional magnetic resonance imaging (RS-fMRI).
Fei-Fei Luo +16 more
doaj +1 more source
Impact of aberrant cerebral perfusion on resting-state functional MRI: A preliminary investigation of Moyamoya disease. [PDF]
PLoS ONE, 2017 The impact of chronic cerebral hypoperfusion on resting-state blood oxygen level-dependent signal fluctuations remains unknown. We aimed to determine whether chronic ischemia induces changes in amplitude of low-frequency fluctuations (ALFF) and to ...
Yituo Wang +12 more
doaj +1 more source