Confirmation of isometric jaw opening exercise for improving hyoid excursion during the swallow

2015 Fiscal Year Final Research Report

• Project/Area Number: 25350625
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Rehabilitation science/Welfare engineering
• Research Institution: Tokai University
• Principal Investigator: YUJI Koyama 東海大学, 医学部, 講師 (80266444)
• Co-Investigator(Kenkyū-buntansha): TOYOKURA Minoru 東海大学, 医学部, 教授 (20217566) ; KASAHARA Takashi 東海大学, 医学部, 講師 (00366014) ; ITO Daiki 東海大学, 医学部, 助教 (00420985)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 開口訓練 / 嚥下障害 / 等尺性筋力訓練 / オトガイ舌骨筋 / 仮想筋長 / 筋収縮率 / リハビリテーション / 改訂開口筋訓練

Outline of Final Research Achievements

Previous reports were limited to Jaw Opening Exercise(JOE) with the tongue free.We hypothesized that pressing and holding the tongue anteriorly against the hard palate(tipper swallow position) serves as a useful anchor to suppress eccentric contraction of the suprahyoid muscles during jaw opening against resistance exercise(Modified JOE).
As for the end position of hyoid anterior displacement (the end distance between the inferior mental spine and the central portion of hyoid bone:DMH), a significant decrease was seen in the tipper swallow group.There was no significant difference in DMH in the resting position between measurements taken before and after Modified JOE, and the length of the suprahyoid muscles, including the geniohyoid muscle, at rest was maintained without elongation.

Free Research Field

リハビリテーション医学