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Dropped Head Syndrome ~Pathology and Treatment~

Research Project

Project/Area Number 21K09333
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 56020:Orthopedics-related
Research InstitutionShowa University

Principal Investigator

Kudo Yoshifumi  昭和大学, 医学部, 教授 (60621985)

Co-Investigator(Kenkyū-buntansha) 豊根 知明  昭和大学, 医学部, 教授 (10407918)
石川 紘司  昭和大学, 医学部, 講師 (40794946)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsdropped head syndrome / cervical spine / deformity / degeneration / 首下がり / 前方注視障害 / 嚥下障害 / アライメント / 胸腰椎圧迫骨折 / 頸椎手術 / 脊柱変形 / 病態解明
Outline of Research at the Start

首下がり症は頚椎後弯(Chin on chest変形)に伴い前方注視障害や嚥下障害など、様々なADL障害をきたす。非常に稀な疾患のため、原因・病態は不明であり、治療方針も確立されていない。
本研究では、首下がり症患者の画像検査や電気生理学的検査に加え、手術症例における病理学的検査、遺伝子発現解析を行い、原因と病態の解明を行う。また、アンケートによる実態調査や身体テストを行い、評価法を確立するとともに、手術成績に基づいた治療戦略を確立したい。

Outline of Final Research Achievements

In this study, we investigated the characteristics features of cervical spine degeneration of dropped head syndrome (DHS), and found that DHS is not caused by myopathy but also by a high degree of degeneration. In some patients, DHS is caused by malalignment of the thoracolumbar spine, and it was found that correction of the thoracolumbar spine could improve chin-on-chest deformity and horizontal gaze difficulty. In most of the DHS patients with thoracolumbar deformity, compression fractures of the thoracolumbar spine was the trigger of pathology. These results suggested that DHS is also a part of age-related degeneration of the whole body. We also examined P/DJK and dysphagia as surgical complications, and reported that evaluation of total spine alignment, compensatory function, and preoperative swallowing function are important for prevention.

Academic Significance and Societal Importance of the Research Achievements

日本は超高齢社会に突入しており、今後も首下がり患者は増加の一途をたどると考えられる。本研究結果より、首下がりは単なる頚椎の筋炎に由来する病態ではなく、全身の老化の一部として脊柱変性に伴い発生していることが示唆された。手術成績の検討においては頚椎のみではなく胸腰椎アライメントの評価が非常に重要である事が判明し、胸腰椎の矯正のみで首下がりが改善することも分かった。術前後の嚥下機能を十分に評価することで、術後嚥下障害を予見し重篤な合併症を減らし安全性の向上につながる。これらの結果は今後の手術戦略の確立に大きく寄与すると思われる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (17 results)

All 2024 2023 2022 2021

All Journal Article (4 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (13 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results)

  • [Journal Article] 首下がり症候群に対する術後成績不良因子2023

    • Author(s)
      工藤理史
    • Journal Title

      脊椎脊髄ジャーナル

      Volume: 36 Pages: 509-514

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Distal junctional failure after corrective surgery without pelvic fixation for thoracolumbar junctional kyphosis due to osteoporotic vertebral fracture2023

    • Author(s)
      Yoshifumi Kudo
    • Journal Title

      Journal of Orthopedic Science

      Volume: Online ahead of print Issue: 3 Pages: 781-787

    • DOI

      10.1016/j.jos.2023.03.002

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Dropped Head Syndrome Caused by Thoracolumbar Deformity: A Report of 3 Cases2022

    • Author(s)
      Yoshifumi Kudo
    • Journal Title

      JBJS case connector

      Volume: 12(4) Issue: 4

    • DOI

      10.2106/jbjs.cc.22.00280

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Radiological features of cervical spine in dropped head syndrome: a matched case?control study2021

    • Author(s)
      Kudo Yoshifumi、Toyone Tomoaki、Okano Ichiro、Ishikawa Koji、Tani Soji、Matsuoka Akira、Maruyama Hiroshi、Yamamura Ryo、Hayakawa Chikara、Tsuchiya Koki、Emori Haruka、Shirahata Toshiyuki、Hoshino Yushi、Ozawa Tomoyuki、Yasukawa Taiki、Inagaki Katsunori
    • Journal Title

      European Spine Journal

      Volume: 30 Issue: 12 Pages: 3600-3606

    • DOI

      10.1007/s00586-021-06939-5

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 首下がり症候群における後頚部筋群の 病理学所見の検討2024

    • Author(s)
      百々悠介
    • Organizer
      日本成人脊柱変形学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Surgical outcomes of Dropped Head Syndrome2024

    • Author(s)
      工藤理史
    • Organizer
      Global Spine Congress2024
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 首下がり症候群の頚椎変性の経時的変化2023

    • Author(s)
      工藤理史
    • Organizer
      日本脊椎脊髄病学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 首下がり症候群に対する手術治療戦略2023

    • Author(s)
      工藤理史
    • Organizer
      日本脊椎脊髄病学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 首下がり症候群患者の嚥下機能評価2023

    • Author(s)
      早川周良
    • Organizer
      日本脊椎脊髄神経手術手技学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 首下がり症候群に対する手術治療戦略2022

    • Author(s)
      工藤理史
    • Organizer
      第29回日本脊椎脊髄神経手術手技学会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Distal junctional failure after corrective surgery without pelvic fixation for thoracolumbar junctional kyphosis due to osteoporotic vertebral fracture2022

    • Author(s)
      工藤理史
    • Organizer
      第31回日本脊椎インストゥルメンテーション学会
    • Related Report
      2022 Research-status Report
  • [Presentation] 首下がりに対する胸腰椎矯正手術2022

    • Author(s)
      工藤理史
    • Organizer
      第12回日本最小侵襲脊椎治療学会
    • Related Report
      2022 Research-status Report
  • [Presentation] 首下がり症に対する手術治療成績 ~現状と今後の課題~2022

    • Author(s)
      工藤理史
    • Organizer
      第71回東日本整形外・災害外科学会
    • Related Report
      2022 Research-status Report
  • [Presentation] 首下がり症候群術後に重篤な嚥下障害を生じた一例2022

    • Author(s)
      早川周良、工藤理史
    • Organizer
      第29回日本脊椎脊髄神経手術手技学会
    • Related Report
      2022 Research-status Report
  • [Presentation] 首下がり症の頚椎変形の特徴  ~首下がり症41例の検討~2021

    • Author(s)
      工藤理史
    • Organizer
      日本脊椎神経手術手技学会
    • Related Report
      2021 Research-status Report
  • [Presentation] Radiological Features of Cervical Spine Deformity in Dropped Head Syndrome2021

    • Author(s)
      工藤理史
    • Organizer
      Spine Across the Sea 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 首下がり症に対する手術治療戦略2021

    • Author(s)
      工藤理史
    • Organizer
      日本脊椎最小侵襲治療学会
    • Related Report
      2021 Research-status Report
    • Invited

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Published: 2021-04-28   Modified: 2025-01-30  

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