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Research for physiological function and epileptogenesis by analysis of high frequency oscillations and phase amplitude coupling using scalp electroencephalography

Research Project

Project/Area Number 19K21356
Project/Area Number (Other) 18H06264 (2018)
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund (2019)
Single-year Grants (2018)
Review Section 0906:Surgery related to the biological and sensory functions and related fields
Research InstitutionJuntendo University

Principal Investigator

Iimura Yasushi  順天堂大学, 医学部, 助教 (30819222)

Project Period (FY) 2018-08-24 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsてんかん / 脳波解析 / 高周波律動 / phase amplitude coupling / phase-amplitude coupling / カップリング / 頭皮脳波 / 頭蓋内脳波
Outline of Research at the Start

てんかんの焦点診断に有用なバイオマーカーとして、脳波の80Hz以上の高周波律動であるHigh Frequency Oscillations(HFO)に加えて、異なる周波数帯域の脳波が相互に関連性を持つcouplingが注目されているが、HFOや徐波の発生機序や病理学的診断との相関が不明である。本研究では、脳波異常の発生機序解明のために、世界で初めて非侵襲的検査である頭皮脳波にて、HFOと徐波のcouplingを解析し、病理学的診断との相関を解明することを目的とした。

Outline of Final Research Achievements

Modulation index (MI) reflects the degree of pathological and physiological phase-amplitude couplings between high frequency oscillations (HFOs) and slow waves in electrocorticography. Children with epileptic spasms (ES) had high values of MI in the intracranial video EEG (Iimura et al., 2018). We explored the MI of interictal epileptic discharges on scalp EEG of a patient with ES secondary to a posterior quadrant leptomeningeal capillary malformation of Sturge-Weber syndrome (SWS), who underwent two-staged surgery. We concluded that decremental MI on scalp EEG could predict good seizure outcome in this patient with SWS and ES.

Academic Significance and Societal Importance of the Research Achievements

頭皮脳波におけるてんかん外科術後の発作予後予測biomarkerの確立が求められている。本研究において、頭皮脳波におけるphase amplitude coupling解析の有用性が示唆されたことから、今後の難治性てんかん患者への応用が期待され、てんかん患者の発作予後改善に寄与することが期待される。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Annual Research Report
  • Research Products

    (23 results)

All 2020 2019 2018

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (20 results) (of which Int'l Joint Research: 5 results,  Invited: 1 results)

  • [Journal Article] Is decremental modulation index on scalp EEG a sign of good seizure outcome? A Sturge-Weber syndrome case with epileptic spasms2019

    • Author(s)
      Iimura Yasushi、Sugano Hidenori、Nakajima Madoka、Higo Takuma、Suzuki Hiroharu、Mitsuhashi Takumi、Ueda Tetsuya、Karagiozov Kostadin、Igarashi Ayuko、Otsubo Hiroshi、Arai Hajime
    • Journal Title

      Clinical Neurophysiology

      Volume: 130 Issue: 9 Pages: 1499-1501

    • DOI

      10.1016/j.clinph.2019.06.002

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The epileptogenic zone in pharmaco-resistant temporal lobe epilepsy with amygdala enlargement.2019

    • Author(s)
      Suzuki H, Sugano H, Nakajima M, Higo T, Iimura Y, Mitsuhashi T, Fusegi K, Kakita A, Otsubo H, Arai H.
    • Journal Title

      Epileptic disorder

      Volume: 21 Issue: 3 Pages: 252-264

    • DOI

      10.1684/epd.2019.1075

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Sudden unexpected death in epilepsy in the bathtub2019

    • Author(s)
      Hayashi Kino、Jin Kazutaka、Nagamori Chizuko、Okanari Kazuo、Okanishi Tohru、Homma Yoichiro、Iimura Yasushi、Uda Takehiro、Takada Lynne、Otsubo Hiroshi
    • Journal Title

      Epilepsy & Behavior

      Volume: 96 Pages: 33-40

    • DOI

      10.1016/j.yebeh.2019.04.009

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] Analysis of electrocorticography in patients with bottom of sulcus dysplasia2020

    • Author(s)
      飯村康司
    • Organizer
      第43回 日本てんかん外科学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Analysis of phase-amplitude coupling between fast and slow oscillations in scalp electroencephalography: Comparison with focal and generalized epileptic spasms2019

    • Author(s)
      Yasushi Iimura
    • Organizer
      The 61st Annual Meeting of the Japanese Society of Child Neurology
    • Related Report
      2019 Annual Research Report
  • [Presentation] Analysis of phase-amplitude coupling between fast and slow oscillations in scalp electroencephalography: Comparison with focal and generalized epileptic spasms2019

    • Author(s)
      Yasushi Iimura
    • Organizer
      The 33rd International Epilepsy Congress
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Analysis of electrocorticography in patients with Bottom of sulcus dysplasia (BOSD)2019

    • Author(s)
      飯村康司
    • Organizer
      てんかん学会関東地方会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Analysis of Phase-Amplitude Coupling in intraoperative EEG for temporal lobe epilepsy2019

    • Author(s)
      飯村康司
    • Organizer
      日本脳神経外科学会総会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Analysis of phase-amplitude coupling between fast and slow oscillations in scalp electroencephalography: Comparison with focal and generalized epileptic spasms2019

    • Author(s)
      Yasushi Iimura
    • Organizer
      The 47th Annual Meeting of the International Society for Pediatric Neurosurgery
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Is decremental modulation index a sign of good seizure outcome; a Sturge-Weber syndrome case with epileptic spasms2019

    • Author(s)
      Yasushi Iimura
    • Organizer
      The 13th Asia Epilepsy Surgery Congress
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 側頭葉てんかんにおける術中脳波Phase-Amplitude coupling解析2019

    • Author(s)
      飯村康司
    • Organizer
      日本てんかん学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Analysis of electrocorticography in patients with Bottom of sulcus dysplasia (BOSD)2019

    • Author(s)
      飯村康司
    • Organizer
      日本臨床神経生理学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Is decremental modulation index on scalp EEG a sign of good seizure outcome? A Sturge-Weber syndrome case with epileptic spasms2019

    • Author(s)
      飯村康司
    • Organizer
      日本臨床神経生理学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Analysis of Phase-Amplitude Coupling in intraoperative electrocorticography for drug-resistant mesial temporal lobe epilepsy2019

    • Author(s)
      Yasushi Iimura
    • Organizer
      American epilepsy society meeting
    • Related Report
      2019 Annual Research Report
  • [Presentation] Strong phase-amplitude coupling between slow oscillations and wide fast ripples in children with epileptic spasms: Investigation of modulation index and occurrence rate2019

    • Author(s)
      飯村康司
    • Organizer
      第21回 脳機能マッピング学会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] てんかん性スパズムに対して頭皮脳波を用いた高周波律動および徐波間のカップリング解析2019

    • Author(s)
      飯村康司
    • Organizer
      第42回てんかん外科学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Callosotomy followed by posterior quadrantectomy in sturge-weber syndrome2018

    • Author(s)
      YASUSHI IIMURA
    • Organizer
      Europe Epilepsy Surgery Meeting
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Strong coupling between slow oscillations and wide fast ripples in children with epileptic spasms: Investigation of modulation index and occurrence rate2018

    • Author(s)
      飯村康司
    • Organizer
      第77回日本脳神経外科学会総会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Strong coupling between slow oscillations and wide fast ripples in children with epileptic spasms: Investigation of modulation index and occurrence rate2018

    • Author(s)
      飯村康司
    • Organizer
      第52回日本てんかん学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Analysis of coupling between fast and slow oscillations in scalp electroencephalography for Sturge-Weber syndrome with contralateral epileptic discharges2018

    • Author(s)
      YASUSHI IIMURA
    • Organizer
      American Epilepsy Society annual meeting
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Epileptogenic high-frequency oscillations skip the motor area with drug-resistant multilobar epilepsy2018

    • Author(s)
      YASUSHI IIMURA
    • Organizer
      第48回日本臨床神経生理学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Analysis of coupling between fast and slow oscillations in scalp electroencephalography for Sturge-Weber syndrome with contralateral epileptic discharges2018

    • Author(s)
      YASUSHI IIMURA
    • Organizer
      第48回日本臨床神経生理学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Analysis of coupling between fast and slow oscillations in scalp electroencephalography for Sturge-Weber syndrome with contralateral epileptic discharges2018

    • Author(s)
      YASUSHI IIMURA
    • Organizer
      第52回日本てんかん学会
    • Related Report
      2018 Annual Research Report

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Published: 2018-08-27   Modified: 2024-03-26  

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