2022 年 7 月 1 日
日本機械学会北海道支部 バイオメカニクス懇話会
第 39 回講演会（共催：バイオメカニクス懇話会，日本機械学会北海道支部）
主査大橋俊朗下記の要領にて第 39 回講演会を本懇話会および日本機械学会北海道支部特別講演会の共催として開催いたします。皆様のご参加をお待ちしております。
記日時：2022 年 7 月 21 日（木），10:00〜11:30

場

所：北海道大学大学院工学研究院・工学部

講演：

大会議室 A1-17 室

10:00 - 10:15「Finite element analysis on clinical treatment methods for sacroiliac joint dysfunction」
Ryota Toyohara, Division of Human Mechanical Systems and Design, Hokkaido
University, Japan
Abstract:
Sacroiliac joint dysfunctions (SIJDs) are considered to account for 15-30% of patients withlow back pain. The sacroiliac joint (SIJ) is located between the sacrum and the ilium andworks as a shock absorber that receives the impact of the trunk and lower limbs. An
unexpected force and/or repeated impacts are hypothesized to cause joint misalignment andinstability and to occur pain arising from the SIJ. A lot of treatment options have beensuggested, however, objective evaluation has not been sufficiently performed. We thus look
into how various treatment procedures are affected. In this talk, we will introduce finiteelement analysis on two types of SIJD treatments: pelvic belts and joint fixation. Bothtreatment methods are intended to fix SIJs, and the results supported this. Finite element
analysis visualizes the treatment effect and clarifies the mechanism.
10:15 - 10:30「Detection of filopodia to identify leader cells in migration by image analysis」
Baasansuren Otgon, Division of Human Mechanical Systems and Design, Hokkaido
University, Japan
Abstract:
Collective cell migration has a crucial role during wound healing, angiogenesis and cancer
metastasis. Studies have highlighted one kind of cell, named leader cells, forms at the leadingedge and regulates collective migration in recent years. Therefore, the identification of leader
cells using modern advanced technology is vital in the metastasis of cancer cells and thetreatment of cancer.

10:30 - 11:00「Kinematic comparison of weightlifting techniques using IMU sensors」
Prof. Batbayar Khuyagbaatar, Biomechanical Research Laboratory, Mongolian
University of Science and Technology (MUST), Mongolia
Abstract:
Weightlifting performance is strongly dependent on technique, explosive strength, andflexibility. There are two major lifts involved in competition: the snatch and the clean and jerk,
and the snatch is the most technical component of the weightlifting competition. Most
technical analyses have previously been performed using either video analysis or conventional
optical camera systems. In this study, we investigated the joint kinematics of the trunk,shoulder, elbow, hip, and knee as well as the main phases during the snatch technique for
Mongolian national and college level weightlifters using multiple IMU sensors. Seven female
Mongolian weightlifters (three national level and four college level) participated. Eachparticipant performed three snatch attempts at 70% of their one-repetition maximum. The joint
angles were calculated using three-axis acceleration and three-axis gyroscope data from theIMU sensors. The six main phases of the snatch technique were defined based on knee flexion.
All parameters were compared between the national and college level weightlifters. This study
provides a kinematic difference between the two different level weightlifters, which may help
coaches and athletes to improve their training strategy and weightlifting performance.
11:00 - 11:30「Normal range of motion of the hip, knee, and ankle joints in Mongolian people」
Prof. Danaa Ganbat, Biomechanical Research Laboratory, Mongolian University of
Science and Technology (MUST), Mongolia
Abstract:
It is important to identify the normal range of motion (ROM) of the human joints for bothbiomechanical and clinical applications. For health care providers, including physicians andtherapists, the restoration of normal ROM is a difficult task. The severity of impaired jointmobility or the postoperative rehabilitation process must be evaluated in comparison with anormal reference value. However, there are no studies that have reported the ROM ofMongolian subjects. In this study, we measured the hip, knee, and ankle joint angles using
multiple wearable inertial sensors. 10 healthy young subjects participated. The
three-dimensional (3D) motion data were collected while the subject were walking at normalspeed. In our knowledge, this study is the first to analyze the normal ROM of Mongolian malesubjects. The collected data can be used as reference values for evaluating the disability of themotion and performance in rehabilitation programs.

世話人・問い合わせ先：大橋俊朗

北海道大学大学院工学研究院人機械・宇宙航空工学部門

Tel&Fax: 011-706-6424, Email: ohashi@eng.hokudai.ac.jp