The Clarification about Mechanism of Awake Bruxism using Neuroimaging Technique

2011 Fiscal Year Final Research Report

• Project/Area Number: 21791921
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Prosthetic dentistry
• Research Institution: Nihon University
• Principal Investigator: IIDA Takashi 日本大学, 松戸歯学部, 助教 (50453882)
• Project Period (FY): 2010 – 2011
• Keywords: 脳イメージング / クレンチング / fMRI

Research Abstract

The aim of this project was to compare the cerebral activity between fists and tooth clenching in first study, and to investigate the role of periodontal afferent inputs on cerebral activation pattern evoked by masticatory muscle in second study. First study showed that bilateral light fist clenching significantly activated the bilateral sensorimotor cortex, while light teeth clenching was significantly associated with activation of bilateral sensorimotor cortex, supplementary motor area, dorsolateral prefrontal cortex, and posterior parietal cortex. Second study showed that there was no difference in cerebral activity between during sham tooth tapping and tooth tapping. Our findings suggest that the cerebral activity during tooth clenching has specific pattern in the central nerve system and the influence of periodontal afferent inputs and associated jaw muscle activity is relatively minor compared to the rhythmic jaw movements.

Research Products

• [Journal Article] Influence of periodontal afferent inputs for human cerebral blood oxygenation during jaw movements (2012)
  • Author(s): Iida T, Sakayanagi M, Svensson P, Komiyama O, Hirayama T, Kaneda T, Sakatani K, Kawara M.
  • Journal Title: Experimental Brain Research Volume: 216 Pages: 375-384
  • Peer Reviewed
• [Journal Article] Comparison of cerebral activity during teeth clenching and fist clenching : a functional magnetic resonance imaging study (2010)
  • Author(s): Iida T, Kato M, Komiyama O, Suzuki H, Asano T, Kuroki T, Kaneda T, Svensson P, Kawara M
  • Journal Title: European Journal of Oral Sciences Volume: 118 Pages: 635-641
  • Peer Reviewed
• [Presentation] Measuring the Effect of Teeth Contact on Cerebral Blood Oxygenation (2010)
  • Author(s): Iida T, Sakayanagi M, Komiyama O, Hirayama T, Kaneda T, Sakatani K, Kawara M.
  • Organizer: 88th International Association for Dental Research
  • Place of Presentation: Spain Barcelona
  • Year and Date: 2010-07-16
• [Presentation] 顎運動における脳賦活範囲の検討 (2010)
  • Author(s): 飯田崇, 阪柳雅志, 小見山道, 淺野隆, 鈴木浩司, 瀧川龍一, 青野寛史, 渡邊愛斗, 黒木俊一, 金田隆, 川良美佐雄
  • Organizer: 第119回日本補綴歯科学会
  • Place of Presentation: 東京ビッグサイト,東京
  • Year and Date: 2010-06-13
• [Presentation] fMRIによる脳賦活部位からみた顎運動の検討 (2009)
  • Author(s): 飯田崇
  • Organizer: 日本補綴歯科学会歯科補綴ウインタースクール
  • Place of Presentation: ウェスティンホテル淡路島,淡路島
  • Year and Date: 2009-11-13
• [Presentation] fMRIを用いた歯の噛みしめと手指運動に関する脳賦活部位の比較 (2009)
  • Author(s): 飯田崇, 加藤正隆, 小見山道, 淺野隆, 鈴木浩司, 瀧川龍一, 吉村万由子, 黒木俊一, 金田隆, 川良美佐雄
  • Organizer: 第118回日本補綴歯科学会
  • Place of Presentation: 国立京都国際会館,京都
  • Year and Date: 2009-06-06