Sato D, Yamashiro K, Yamazaki Y, Tsubaki A, Onishi H, Takehara N, Maruyama A
Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan.
Department of Health and Sports, Niigata University of Health and Welfare, Niigata, Japan.
Adv Exp Med Biol. 2017;977:233-240. doi: 10.1007/978-3-319-55231-6_32.
Our previous studies have shown that water immersion (WI) changes sensorimotor processing and cortical excitability in the sensorimotor regions of the brain. The present study examined the site specificity of the brain activation during WI using functional near infrared spectroscopy (fNIRS). Cortical oxyhaemoglobin (OHb) levels in the anterior and posterior parts of the supplementary motor area (pre-SMA and SMA), primary motor cortex (M1), primary somatosensory cortex (S1), and posterior parietal cortex (PPC) were recorded using fNIRS (OMM-3000; Shimadzu Co.) before, during, and after WI in nine healthy participants. The cortical OHb levels in SMA, M1, S1, and PPC significantly increased during the WI and increased gradually along with the filling of the WI tank. These changes were not seen in the pre-SMA. The results show that WI-induced increases in cortical OHb levels are at least somewhat site specific: there was little brain activation in response to somatosensory input in the pre-SMA, but robust activation in other areas.
我们之前的研究表明，水浸（WI）会改变大脑感觉运动区域的感觉运动处理和皮质兴奋性。本研究使用功能近红外光谱（fNIRS）检查了水浸过程中大脑激活的部位特异性。在9名健康参与者进行水浸前、水浸期间和水浸后，使用fNIRS（OMM - 3000；岛津公司）记录辅助运动区（前辅助运动区和辅助运动区）、初级运动皮层（M1）、初级体感皮层（S1）和顶叶后皮层（PPC）前后部的皮质氧合血红蛋白（OHb）水平。在水浸期间，辅助运动区、M1、S1和PPC的皮质OHb水平显著升高，并随着水浸槽的注满而逐渐增加。在前辅助运动区未观察到这些变化。结果表明，水浸引起的皮质OHb水平升高至少在一定程度上具有部位特异性：前辅助运动区对体感输入的脑激活很少，但其他区域有强烈激活。
