期刊
NEUROIMAGE-CLINICAL
卷 6, 期 -, 页码 222-228出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.nicl.2014.09.011
关键词
Chronic tinnitus; ALFF; fMRI
类别
资金
- Major State Basic Research Development Program of China (973 Program) [2013CB733800, 2013CB733803]
- National Natural Science Foundation of China [81230034, 81271739]
- Jiangsu Provincial Special Program of Medical Science [BL2013029]
- Fundamental Research Funds for the Central Universities
- Jiangsu Graduate Student Innovation Grant [KYZZ_076]
- China Scholarship Council [201406090139]
Objective: The neural mechanisms that give rise to the phantom sound of tinnitus are poorly understood. This study aims to investigate whether aberrant spontaneous brain activity exists in chronic tinnitus patients using resting-state functional magnetic resonance imaging (fMRI) technique. Materials and methods: A total of 31 patients with chronic tinnitus patients and 32 healthy age-, sex-, and education-matched healthy controls were prospectively examined. Both groups had normal hearing thresholds. Wecalculated the amplitude of low-frequency fluctuations (ALFFs) of fMRI signals to measure spontaneous neuronal activity and detect the relationship between fMRI information and clinical data of tinnitus. Results: Compared with healthy controls, we observed significant increased ALFF within several selected regions including the right middle temporal gyrus (MTG), right superior frontal gyrus (SFG), and right angular gyrus; decreased ALFF was detected in the left cuneus, right middle occipital gyrus and bilateral thalamus. Moreover, tinnitus distress correlated positively with increased ALFF in right MTG and right SFG; tinnitus duration correlated positively with higher ALFF values in right SFG. Conclusions: The present study confirms that chronic tinnitus patients have aberrant ALFF in many brain regions, which is associated with specific clinical tinnitus characteristics. ALFF disturbance in specific brain regions might be used to identify the neuro-pathophysiological mechanisms in chronic tinnitus patients. (C) 2014 Published by Elsevier Inc.
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