Involvement of secondary motor areas in externally-triggered single-finger movements of dominant and a non-dominant hands

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	Involvement of secondary motor areas in externally-triggered single-finger movements of dominant and a non-dominant hands
	Gu, Y ; Zang, WF ; Weng, XC; Jia, FC ; Li, EZ ; Wang, JJ; WENG Xuchu
摘要	Whether the secondary motor areas are involved in simple voluntary movements remains controversial. Differences in the neural substrates of movements with the dominant and the non-dominant hands have not been well documented. In the present study, functional magnetic resonance imaging (fMRI) was used to investigate the hemodynamic response in the primary motor cortex (M1), supplementary motor area (SMA) and premotor cortex (PMC) in six healthy right-handed subjects while performing a visually-guided ringer-tapping task with their dominant or non-dominant hands. Significant activation was observed in M1, SMA and PMC during this externally triggered simple voluntary movement task. While dominant hand movements only activated contralateral motor areas, non-dominant hand movements also activated ipsilateral SMA and PMC. The results provide strong evidence for the involvement of the secondary motor areas in simple voluntary movements, and also suggest that movements of the dominant hand primarily engage the contralateral secondary motor areas, whereas movements of the non-dominant hand engage bilateral secondary motor areas.; Whether the secondary motor areas are involved in simple voluntary movements remains controversial. Differences in the neural substrates of movements with the dominant and the non-dominant hands have not been well documented. In the present study, functional magnetic resonance imaging (fMRI) was used to investigate the hemodynamic response in the primary motor cortex (M1), supplementary motor area (SMA) and premotor cortex (PMC) in six healthy right-handed subjects while performing a visually-guided ringer-tapping task with their dominant or non-dominant hands. Significant activation was observed in M1, SMA and PMC during this externally triggered simple voluntary movement task. While dominant hand movements only activated contralateral motor areas, non-dominant hand movements also activated ipsilateral SMA and PMC. The results provide strong evidence for the involvement of the secondary motor areas in simple voluntary movements, and also suggest that movements of the dominant hand primarily engage the contralateral secondary motor areas, whereas movements of the non-dominant hand engage bilateral secondary motor areas.
关键词	functional magnetic resonance imaging (fMRI) primary motor cortex (M1) secondary motor areas supplementary motor area (SMA) premotor cortex (PMC) simple voluntary movement dominant hand
学科领域	生理心理学/生物心理学
	2003-08-01
语种	英语
发表期刊	CHINESE SCIENCE BULLETIN
ISSN	1001-6538
卷号	48 期号:15 页码:1569-1575
期刊论文类型	Article
收录类别	SCI
WOS记录号	WOS:000184925400013
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.psych.ac.cn/handle/311026/5499
专题	中国科学院心理研究所回溯数据库(1956-2010)
通讯作者	WENG Xuchu
作者单位	1.Chinese Acad Sci, Inst Psychol, Lab Higher Brain Funct, Beijing 100101, Peoples R China 2.Nanjing Univ, Dept Biol Sci & Technol, Nanjing 210093, Peoples R China 3.Shougang Gen Hosp, Dept MRI, Beijing 100041, Peoples R China
推荐引用方式 GB/T 7714	Gu, Y,Zang, WF,Weng, XC,et al. Involvement of secondary motor areas in externally-triggered single-finger movements of dominant and a non-dominant hands[J]. CHINESE SCIENCE BULLETIN,2003,48(15):1569-1575.
APA	Gu, Y.,Zang, WF.,Weng, XC.,Jia, FC.,Li, EZ.,...&WENG Xuchu.(2003).Involvement of secondary motor areas in externally-triggered single-finger movements of dominant and a non-dominant hands.CHINESE SCIENCE BULLETIN,48(15),1569-1575.
MLA	Gu, Y,et al."Involvement of secondary motor areas in externally-triggered single-finger movements of dominant and a non-dominant hands".CHINESE SCIENCE BULLETIN 48.15(2003):1569-1575.

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