Does variability of sympathetic nerve activity affect the habit of low-level masticatory muscle activity during daytime?

2015 Fiscal Year Final Research Report

• Project/Area Number: 26861618
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Prosthodontics/ Dental materials science and
• Research Institution: Hokkaido University
• Principal Investigator: MIKAMI Saki 北海道大学, 歯学研究科(研究院), 専門研究員 (70704477)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: 咬筋筋電図 / 交感神経活動 / 心電図 / ブラキシズム

Outline of Final Research Achievements

We established a system which can measure masseter muscle activity and sympathetic nerve activity at the same time during the entire day by means of data-logger-type small biosignal measuring devices.We investigated temporal associations between masseter muscle activity and sympathetic nerve activity in patients with suspected bruxism during the entire day. During sleep, masseter muscle activity and LF/HF ratio which is the parameter of sympathetic nerve activity increased simultaneously in considerable cases. During daytime, there were some cases in which masseter muscle activity and LF/HF ratio changed simultaneously. However, we could not demonstrated apparent temporal association between masseter muscle activity and LF/HF ratio during daytime.

Free Research Field

医歯薬学