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題名 Automatic inhibitory function in the human somatosensory and motor cortices: An MEG-MRS study
作者 Cheng, Chia-Hsiung;Tsai, Shang-Yueh;Liu, Chia-Yih;Niddam, David M.
蔡尚岳
貢獻者 應物所 ; 心腦中心
日期 2017
上傳時間 25-七月-2017 15:53:11 (UTC+8)
摘要 While the automatic inhibitory function of the human cerebral cortex has been extensively investigated by means of electrophysiological recordings, the corresponding modulating neurochemical mechanisms remain unclear. We aimed to examine whether the primary somatosensory (SI) and primary motor cortical (MI) inhibitory function is associated with endogenous GABA levels. Eighteen young participants received paired-pulse and single-pulse electrical stimulation to the median nerve during magnetoencephalographic recordings. The SI sensory gating (SG), considered as an automatic inhibitory ability, was measured as the amplitude ratio of Stimulus 2 over Stimulus 1, in the paired-pulse paradigm. In addition, stimulus-induced beta activity, considered to originate from MI and also to be related to inhibitory function, was estimated using the single-pulse paradigm. The GABA+ concentration of the sensorimotor cortex was acquired from each subject by using magnetic resonance spectroscopy (MRS). A lower SG ratio in SI was significantly associated with an increased beta power in MI. More importantly, the beta rebound power, but not SI SG ratio, was positively correlated with GABA+ concentration. Our findings show a tight functional relationship between SI and MI during processing of automatic inhibition. GABA+ levels appear to be more closely related to the automatic inhibitory function of MI than SI.
關聯 Volume 7, Issue 1, 論文編號 4234
資料類型 article
DOI http://dx.doi.org/10.1038/s41598-017-04564-1
dc.contributor 應物所 ; 心腦中心
dc.creator (作者) Cheng, Chia-Hsiung;Tsai, Shang-Yueh;Liu, Chia-Yih;Niddam, David M.en-US
dc.creator (作者) 蔡尚岳zh-tw
dc.date (日期) 2017
dc.date.accessioned 25-七月-2017 15:53:11 (UTC+8)-
dc.date.available 25-七月-2017 15:53:11 (UTC+8)-
dc.date.issued (上傳時間) 25-七月-2017 15:53:11 (UTC+8)-
dc.identifier.uri (URI) http://nccur.lib.nccu.edu.tw/handle/140.119/111409-
dc.description.abstract (摘要) While the automatic inhibitory function of the human cerebral cortex has been extensively investigated by means of electrophysiological recordings, the corresponding modulating neurochemical mechanisms remain unclear. We aimed to examine whether the primary somatosensory (SI) and primary motor cortical (MI) inhibitory function is associated with endogenous GABA levels. Eighteen young participants received paired-pulse and single-pulse electrical stimulation to the median nerve during magnetoencephalographic recordings. The SI sensory gating (SG), considered as an automatic inhibitory ability, was measured as the amplitude ratio of Stimulus 2 over Stimulus 1, in the paired-pulse paradigm. In addition, stimulus-induced beta activity, considered to originate from MI and also to be related to inhibitory function, was estimated using the single-pulse paradigm. The GABA+ concentration of the sensorimotor cortex was acquired from each subject by using magnetic resonance spectroscopy (MRS). A lower SG ratio in SI was significantly associated with an increased beta power in MI. More importantly, the beta rebound power, but not SI SG ratio, was positively correlated with GABA+ concentration. Our findings show a tight functional relationship between SI and MI during processing of automatic inhibition. GABA+ levels appear to be more closely related to the automatic inhibitory function of MI than SI.
dc.format.extent 1469937 bytes-
dc.format.mimetype application/pdf-
dc.relation (關聯) Volume 7, Issue 1, 論文編號 4234
dc.title (題名) Automatic inhibitory function in the human somatosensory and motor cortices: An MEG-MRS studyen-US
dc.type (資料類型) article
dc.identifier.doi (DOI) 10.1038/s41598-017-04564-1
dc.doi.uri (DOI) http://dx.doi.org/10.1038/s41598-017-04564-1