Results 41 to 50 of about 29,753 (243)

Dynamic Altered Amplitude of Low-Frequency Fluctuations in Patients With Major Depressive Disorder [PDF]

Frontiers in Psychiatry, 2021
Background: Major depressive disorder (MDD) has demonstrated abnormalities of static intrinsic brain activity measured by amplitude of low-frequency fluctuation (ALFF). Recent studies regarding the resting-state functional magnetic resonance imaging (rs-fMRI) have found the brain activity is inherently dynamic over time.
Ruiping Zheng, Yuan Chen, Yu Jiang, Mengmeng Wen, Bingqian Zhou, Shuying Li, Yarui Wei, Zhengui Yang, Caihong Wang, Jingliang Cheng, Yong Zhang, Shaoqiang Han   +11 more
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Altered Brain Fraction Amplitude of Low Frequency Fluctuation at Resting State in Patients With Early Left and Right Bell’s Palsy: Do They Have Differences?

Frontiers in Neuroscience, 2018
Purpose: Bell’s palsy refers to acute idiopathic unilateral facial nerve palsy. It is a common disorder of the main motor pathway to the facial muscles.
Xiaowei Han, Xiaowei Han, Haimei Li, Xiaochun Wang, Yijiang Zhu, Tianbin Song, Lei Du, Shilong Sun, Runcai Guo, Jing Liu, Sumin Shi, Chao Fu, Wenwen Gao, Lu Zhang, Guolin Ma   +14 more
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Static and Dynamic Changes of Amplitude of Low-Frequency Fluctuations in Cervical Discogenic Pain [PDF]

Frontiers in Neuroscience, 2020
Cervical discogenic pain (CDP) is a clinically common pain syndrome caused by cervical disk degeneration. A large number of studies have reported that CDP results in brain functional impairments. However, the detailed dynamic brain functional abnormalities in CDP are still unclear.
Mingyue Ma, Hong Zhang, Run Liu, Hongsheng Liu, Xiangchun Yang, Xiaohui Yin, Song Chen, Xiaoping Wu   +7 more
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Altered trigeminothalamic spontaneous low-frequency oscillations in migraine without aura: a resting-state fMRI study

BMC Neurology, 2021
Background Recent resting-state fMRI studies demonstrated functional dysconnectivity within the central pain matrix in migraineurs. This study aimed to investigate the spatial distribution and amplitude of low-frequency oscillations (LFOs) using ...
Ye Eun Kim, Min Kyung Kim, Sang-il Suh, Ji Hyun Kim   +3 more
doaj   +1 more source

Regional brain dysfunction in insomnia after ischemic stroke: A resting-state fMRI study

Frontiers in Neurology, 2022
ObjectiveThis study aimed to explore the abnormality of local brain function in patients with post-stroke insomnia (PSI) based on fMRI and explore the possible neuropathological mechanisms of insomnia in patients with PSI in combination with the ...
Hongzhuo Wang, Yunxuan Huang, Mingrui Li, Han Yang, Jie An, Xi Leng, Danghan Xu, Shijun Qiu   +7 more
doaj   +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, Danielle, Lee, Lino, Becerra, David, Borsook   +3 more
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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
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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

Amplitude of Low-Frequency Fluctuations in Multiple-Frequency Bands in Acute Mild Traumatic Brain Injury [PDF]

Frontiers in Human Neuroscience, 2016
Functional disconnectivity during the resting state has been observed in mild traumatic brain injury (mTBI) patients during the acute stage. However, it remains largely unknown whether the abnormalities are related to specific frequency bands of the low-frequency oscillations (LFO).
Zhan, Jie, Gao, Lei, Zhou, Fuqing, Bai, Lijun, Kuang, Hongmei, He, Laichang, Zeng, Xianjun, Gong, Honghan   +7 more
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Dynamic changes in fractional amplitude of low-frequency fluctuations in patients with chronic insomnia

Frontiers in Neuroscience, 2022
BackgroundPrevious neuroimaging studies have mostly focused on changes in static functional connectivity in patients with chronic insomnia (CI). Features of dynamic brain activity in patients with CI have rarely been described in detail. The present study investigated changes in dynamic intrinsic brain activity in patients with CI by dynamic fractional
Wei Chen, Hui Wang, Hui Wang, Tianze Sun, Qi Wu, Wenxuan Han, Qian Li, Yong Liu, Yuanping Zhou, Xiuyong He   +9 more
openaire   +3 more sources