نتایج جستجو برای: multiple sclerosis fmri alff

تعداد نتایج: 819476  

Journal: :Magnetic resonance imaging 2013
Rui Yuan Xin Di Eun H Kim Sabrina Barik Bart Rypma Bharat B Biswal

The task induced blood oxygenation level dependent signal changes observed using functional magnetic resonance imaging (fMRI) are critically dependent on the relationship between neuronal activity and hemodynamic response. Therefore, understanding the nature of neurovascular coupling is important when interpreting fMRI signal changes evoked via task. In this study, we used regional homogeneity ...

2015
Dewang Mao Zhongxiang Ding Wenbin Jia Wei Liao Xun Li Huiyuan Huang Jianhua Yuan Yu-Feng Zang Han Zhang Emmanuel Andreas Stamatakis

The amplitude of low-frequency fluctuation (ALFF) measures low-frequency oscillations of the blood-oxygen-level-dependent signal, characterizing local spontaneous activity during the resting state. ALFF is a commonly used measure for resting-state functional magnetic resonance imaging (rs-fMRI) in numerous basic and clinical neuroscience studies. Using a test-retest rs-fMRI dataset consisting o...

Journal: :Neuroscience letters 2011
Yan Yin Lingjiang Li Changfeng Jin Xiaolei Hu Lian Duan Lisa T Eyler Qiyong Gong Ming Song Tianzi Jiang Mei Liao Yan Zhang Weihui Li

Little is known about how spontaneous brain activity during the resting state may be altered in posttraumatic stress disorder (PTSD) compared to traumatized individuals. In the current study, we used a measure of amplitude of low-frequency (0.01-0.08 Hz) fluctuation (ALFF) to investigate the regional baseline brain function of this disorder. Fifty-four medication-naive PTSD patients and seventy...

2012
Y. Kwak S. J. Peltier N. I. Bohnen M. L. T. M. Müller P. Dayalu R. D. Seidler

Analysis of the amplitude of low frequency BOLD signal fluctuations (ALFF) in the resting state has recently been used to study the dynamics of intrinsic neural activity. Several studies have also suggested its potential as a biomarker for neuropsychiatric disease. In the current study, we quantified ALFF to determine changes in intrinsic neural oscillations in patients with Parkinson's disease...

Journal: :jentashapir journal of health research 0
shahnaz mohammadi department of psychology, kharazmi university, tehran, ir iran maryam izadi-mazidi department of psychology, department of psychology, shahed university, tehran, ir iran; department of psychology, shahid chamran university, ahvaz, ir iran. tel: +98-9171346040 negin kazemi department of psychology, kharazmi university, tehran, ir iran

conclusions our study suggests that the personality traits of patients with ms and healthy individuals are not significantly different. patients with ms are likely to use the same coping strategies as healthy individuals, except in the subscale of distancing. results no significant differences in personality characteristics were observed between patients and healthy controls (all p > 0.05). onl...

Journal: :NeuroImage 2010
Xiaoqi Huang Su Lui Wei Deng Raymond C. K. Chan Qizhu Wu Li-Jun Jiang Jun-Ran Zhang Zhiyun Jia Xiu-Li Li Fei Li Long Chen Tao Li Qiyong Gong

BACKGROUND Spontaneous low-frequency fluctuations (LFF) in the blood oxygen level-dependent (BOLD) functional magnetic resonance imaging (fMRI) signal have been shown to reflect cerebral spontaneous neural activity, and the present study attempts to explore the functional changes in the regional brain in patients with schizophrenia using the amplitude of the BOLD signals. METHODS A total of 6...

2017
Qian Ran Jia Chen Chuan Li Li Wen Faguo Yue Tongsheng Shu Jianxun Mi Guangxian Wang Lei Zhang Dong Gao Dong Zhang

PURPOSE Chronic primary insomnia (CPI) is the most prevalent sleep disorder worldwide. CPI manifests as difficulties in sleep onset, maintaining sleep, prolonged sleep latency, and daytime impairment and is often accompanied by cognitive problems such as poor academic performance, poor attention, and decreased memory. The most popular explanation of insomnia is hyperarousal or increased activit...

2017
Wei Pan Xuemei Gao Shuo Shi Fuqu Liu Chao Li

A great many of empirical researches have proved that longtime exposure to violent video game can lead to a series of negative effects. Although research has focused on the neural basis of the correlation between violent video game and aggression, little is known whether the spontaneous brain activity is associated with violent video game exposure. To address this question, we measured the spon...

2015
Yang Liao Meiying Lei Haibo Huang Chuang Wang Jiaobo Duan Hongzheng Li Xufeng Liu

Microgravity causes multiple changes in physical and mental levels in humans, which can induce performance deficiency among astronauts. Studying the variations in brain activity that occur during microgravity would help astronauts to deal with these changes. In the current study, resting-state functional magnetic resonance imaging (rs-fMRI) was used to observe the variations in brain activity d...

2015
Xin Huang Feng-Qin Cai Pei-Hong Hu Yu-Lin Zhong Ying Zhang Rong Wei Chong-Gang Pei Fu-Qing Zhou Yi Shao

OBJECTIVE To use the amplitude of low-frequency fluctuation (ALFF) technique to investigate the local features of spontaneous brain activity in optic neuritis (ON) and their relationship with behavioral performance. MATERIALS AND METHODS Twelve patients with ON (four male, eight female) and twelve age-, sex-, and education status-matched healthy controls (HCs) (four male, eight female) underw...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید