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Regional homogeneity approach to fMRI data analysis
Zang, YF; Jiang, TZ; Lu, YL; He, Y; Tian, LX
Source PublicationNEUROIMAGE
AbstractKendall's coefficient concordance (KCC) can measure the similarity of a number of time series. It has been used for purifying a given cluster in functional MRI (fMRI). In the present study, a new method was developed based on the regional homogeneity (ReHo), in which KCC was used to measure the similarity of the time series of a given voxel to those of its nearest neighbors in a voxel-wise way. Six healthy subjects performed left and right finger movement tasks in event-related design five of them were additionally scanned in a rest condition. KCC was compared among the three conditions (left finger movement, right finger movement, and the rest). Results show that bilateral primary motor cortex (M1) had higher KCC in either left or right finger movement condition than in rest condition. Contrary to prediction and to activation pattern, KCC of ipsilateral M1 is significantly higher than contralateral M1 in unilateral finger movement conditions. These results support the previous electrophysiologic findings of increasing ipsilateral M1 excitation during unilateral movement. ReHo can consider as a complementary method to model-driven method, and it could help reveal the complexity of the human brain function. More work is needed to understand the neural mechanism underlying ReHo. (C) 2004 Elsevier Inc. All rights reserved.
KeywordFmri Kendall's Coefficient Concordance Motor Cortex General Linear Model
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Indexed BySCI
WOS Research AreaNeurosciences & Neurology ; Radiology, Nuclear Medicine & Medical Imaging
WOS SubjectNeurosciences ; Neuroimaging ; Radiology, Nuclear Medicine & Medical Imaging
WOS IDWOS:000221190200041
Citation statistics
Cited Times:1838[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Natl Lab Pattern Recognit, Inst Automat, Beijing 100080, Peoples R China
2.Chinese Acad Sci, Key Lab Mental Hlth, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Zang, YF,Jiang, TZ,Lu, YL,et al. Regional homogeneity approach to fMRI data analysis[J]. NEUROIMAGE,2004,22(1):394-400.
APA Zang, YF,Jiang, TZ,Lu, YL,He, Y,&Tian, LX.(2004).Regional homogeneity approach to fMRI data analysis.NEUROIMAGE,22(1),394-400.
MLA Zang, YF,et al."Regional homogeneity approach to fMRI data analysis".NEUROIMAGE 22.1(2004):394-400.
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