Cortical activities accompanying somatosensory input and transcranial direct current stimulation- MEG and TMS study-

2015 Fiscal Year Final Research Report

• Project/Area Number: 25282162
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Rehabilitation science/Welfare engineering
• Research Institution: Niigata University of Health and Welfare
• Principal Investigator: Onishi Hideaki 新潟医療福祉大学, 医療技術学部, 教授 (90339953)
• Co-Investigator(Kenkyū-buntansha): Tamaki Hiroyuki 新潟医療福祉大学, 医療技術学部, 教授 (40253926) ; Kirimoto Hikari 新潟医療福祉大学, 医療技術学部, 教授 (40406260) ; Sato Daisuke 新潟医療福祉大学, 健康科学部, 准教授 (60544393) ; Yamashiro Koya 新潟医療福祉大学, 健康科学部, 講師 (20570782)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 脳磁図 / MEG / 他動運動 / 経頭蓋直流電流刺激 / tDCS / 経頭蓋磁気刺激 / 求心性抑制 / 求心性促通

Outline of Final Research Achievements

We analyzed cortical activities following passive movements (PM), peripheral nerve stimulation and transcranial direct current stimulation to investigate the somatosensory cortical processing following voluntary movement. 1) 3rd component of somatosensory evoked magnetic fields (SEF) following PM reflect cutaneous input. 2) There is no relation between afferent facilitation and the latency of cutaneomuscular reflexes or SEF after digital nerve stimulation. 3) The source strengths for the P35m and the P60m of SEF following median nerve stimulation increased after tDCS was applied over the primary motor cortex (M1) and increased for the P60m after tDCS was applied over the primary somatosensory cortex (S1). 4) Cathodal tDCS over the M1 decreases not only the M1 excitability but also the cortical inhibitory circuits related to short latency afferent inhibition (SAI). In addition, cathodal tDCS applied over the S1 decreased the inhibitory effects of SAI.

Free Research Field

複合領域