Control of awake bruxism from central nerve system

• Project/Area Number: 26861655
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Prosthodontics/ Dental materials science and
• Research Institution: Nihon University
• Principal Investigator: IIDA Takashi 日本大学, 松戸歯学部, 講師 (50453882)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000); Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
• Keywords: 日中クレンチング / 中枢 / 可塑性変化 / クレンチング / ブラキシズム / MRI / fMRI / TMS / 核磁気共鳴画像法

Outline of Final Research Achievements

The aim of this study was to compare the motor evoked potentials (MEPs) in the corticomotor control of jaw-closing muscles between healthy participants and participants with bruxism. 27 participants measured temporalis muscle activity using a portable EMG device during sleep. All participants classified into healthy participants and participants with bruxism. from the masseter and the first dorsal interosseous (FDI) muscles were obtained using TMS. Masseter MEPs of participants with bruxism tended to be slightly lower than healthy participants. However there were no significant differences in FDI MEPs between both groups. Our findings suggest that the performance of bruxism can trigger neuroplastic changes in the corticomotor control of the jaw-closing muscles.

Research Products

• [Journal Article] Effect of a repeated tongue-lift motor task for tongue function. (2016)
  • Author(s): Honki H, Iida T, Komiyama O, Masuda M, Svensson P, Kawara M.
  • Journal Title: Eur J Oral Sci. Volume: 124 Issue: 6 Pages: 540-545
  • DOI: 10.1111/eos.12300
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Effect of a repeated jaw motor task on masseter muscle performance. (2015)
  • Author(s): Iida T, Komiyama O, Honki H, Komoda Y, Baad-Hansen L, Kawara M, Svensson P.
  • Journal Title: Arch Oral Biol. Volume: 60 Issue: 11 Pages: 1625-1631
  • DOI: 10.1016/j.archoralbio.2015.08.005
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Repeated tongue lift movement induces neuroplasticity in corticomotor control of tongue and jaw muscles in humans. (2015)
  • Author(s): Komoda Y, Iida T, Kothari M, Komiyama O, Baad-Hansen L, Kawara M, Sessle B, Svensson P.
  • Journal Title: Brain Res. Volume: 1627 Pages: 70-79
  • DOI: 10.1016/j.brainres.2015.09.016
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Comparison of direct and indirect occlusal contact examinations with different clenching intensities (2015)
  • Author(s): Osamu Komiyama, Ryoko Obara, Takashi Iida, Takashi Asano, Manabu Masuda, Takashi Uchida, Antoon De Laat, Misao Kawara
  • Journal Title: Journal of Oral Rehabilitation Volume: 42 Issue: 3 Pages: 185-191
  • DOI: 10.1111/joor.12242
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] 下顎運動と舌挙上運動の相互作用が運動野の神経可塑性変化へ及ぼす影響 (2016)
  • Author(s): 飯田崇，薦田祥博，増田学，本田実加，小見山道，川良美佐雄
  • Organizer: 公益社団法人日本補綴歯科学会 第125回学術大会
  • Place of Presentation: 石川県立音楽堂，ANAクラウンプラザホテル金沢（石川県，金沢市）
  • Year and Date: 2016-07-08
• [Presentation] Interactions between jaw and tongue movements influence motor cortical neuroplasticity (2016)
  • Author(s): Iida T, Komoda Y, Komiyama O, Baad-Hansen L, Kawara M, Svensson P
  • Organizer: 94th International Association for Dental Research
  • Place of Presentation: COEX (Seoul, South Korea)
  • Year and Date: 2016-06-22
  • Int'l Joint Research
• [Presentation] 口腔領域の運動が運動野の可塑性変化へ及ぼす影響 (2015)
  • Author(s): 飯田崇，薦田祥博, 小見山道，小原綾子，増田学，川良美佐雄
  • Organizer: 第20回日本口腔顔面痛学会学術大会
  • Place of Presentation: 名古屋国際会議場（愛知県，名古屋市）
  • Year and Date: 2015-07-04
• [Presentation] 継続した舌挙上運動が一次運動野へ及ぼす影響 (2015)
  • Author(s): 薦田祥博, 飯田崇, 小見山道，川良美佐雄
  • Organizer: 日本補綴歯科学会第124回学術大会
  • Place of Presentation: 大宮ソニックシティ（埼玉県，さいたま市）
  • Year and Date: 2015-05-30
• [Presentation] Effect of repeated jaw motor task on masticatory muscles (2014)
  • Author(s): Takashi Iida
  • Organizer: 92th International Association for Dental Research
  • Place of Presentation: Cape Town, South Africa
  • Year and Date: 2014-06-25 – 2014-06-28
• [Presentation] ブラキシズムの病因解明の今後 (2014)
  • Author(s): 飯田崇
  • Organizer: 日本補綴歯科学会 第123回学術大会
  • Place of Presentation: 仙台国際センター
  • Year and Date: 2014-05-24 – 2014-05-25
  • Invited