Impact of Global Normalization in fMRI Acupuncture Studies | |
Sun, Jinbo1; Qin, Wei1; Jin, Lingmin1; Dong, Minghao1; Yang, Xuejuan1; Zhu, Yuanqiang1; Yang, Yang1; von Deneen, Karen M.1; Gong, Qiyong2; Tian, Jie1,3 | |
刊名 | EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE |
2012 | |
页码 | - |
英文摘要 | Global normalization is often used as a preprocessing step for dispelling the "nuisance effects." However, it has been shown in cognitive and emotion tasks that this preprocessing step might greatly distort statistical results when the orthogonality assumption of global normalization is violated. The present study examines this issue in fMRI acupuncture studies. Thirty healthy subjects were recruited to evaluate the impacts of the global normalization on the BOLD responses evoked by acupuncture stimulation during De-qi sensation and tactile stimulation during nonpainful sensations. To this end, we compared results by conducting global normalization (PSGS) and not conducting global normalization (NO PSGS) based on a proportional scaling model. The orthogonality assumption of global normalization was violated, and significant changes between BOLD responses for NO PSGS and PSGS were shown in most subjects. Extensive deactivations of acupuncture in fMRI were the non-specifically pernicious consequences of global normalization. The central responses of acupuncture during De-qi are non-specifically activation-dominant at the somatosensory-related brain network, whose statistical power is specifically enhanced by PSGS. In conclusion, PSGS should be unjustified for acupuncture studies in fMRI. The differences including the global normalization or not may partly contribute to conflicting results and interpretations in previous fMRI acupuncture studies. |
WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
类目[WOS] | Integrative & Complementary Medicine |
研究领域[WOS] | Integrative & Complementary Medicine |
关键词[WOS] | FUNCTIONAL MRI ; DEFAULT MODE ; HUMAN BRAIN ; ELECTROACUPUNCTURE STIMULATION ; COGNITIVE NEUROSCIENCE ; NEURONAL SPECIFICITY ; CORTICAL ACTIVATIONS ; IMPLICATED ACUPOINTS ; EMPIRICAL ANALYSES ; HEALTHY-SUBJECTS |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000312858300001 |
内容类型 | 期刊论文 |
源URL | [http://ir.ia.ac.cn/handle/173211/4053] |
专题 | 自动化研究所_中国科学院分子影像重点实验室 |
作者单位 | 1.Xidian Univ, Sch Life Sci & Technol, Life Sci Res Ctr, Xian 710071, Shaanxi, Peoples R China 2.Sichuan Univ, W China Hosp, Dept Radiol, Huaxi MR Res Ctr HMRRC, Chengdu 610041, Sichuan, Peoples R China 3.Chinese Acad Sci, Inst Automat, Beijing 100190, Peoples R China |
推荐引用方式 GB/T 7714 | Sun, Jinbo,Qin, Wei,Jin, Lingmin,et al. Impact of Global Normalization in fMRI Acupuncture Studies[J]. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE,2012:-. |
APA | Sun, Jinbo.,Qin, Wei.,Jin, Lingmin.,Dong, Minghao.,Yang, Xuejuan.,...&Tian, Jie.(2012).Impact of Global Normalization in fMRI Acupuncture Studies.EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE,-. |
MLA | Sun, Jinbo,et al."Impact of Global Normalization in fMRI Acupuncture Studies".EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE (2012):-. |
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