九州大学 研究者情報
研究者情報 (研究者の方へ)入力に際してお困りですか?
基本情報 研究活動 教育活動 社会活動
AN QI(あん ち) データ更新日:2021.06.18



主な研究テーマ
・ヒトの運動制御メカニズムの解明
・片麻痺患者のリハビリテーションシステムの開発
・運動機能を推定する福祉機器の開発
キーワード:運動制御理論,リハビリテーション,福祉機器
2020.04~2020.04.
従事しているプロジェクト研究
自信を持たせる動作支援: 動作予測と体性感覚呈示とモニタリングによる柔らかい支援
2021.04~2026.03, 代表者:中村裕一, 京都大学, 日本.
片麻痺患者への理学療法士の介入の解明とリハビリテーションシステムへの応用
2018.04~2021.03, 代表者:安琪, 九州大学, 日本.
片麻痺患者の起立動作の回復過程を計測する手すりの開発
2019.06~2022.03, 代表者:安琪, 九州大学, 日本.
研究業績
主要原著論文
1. Ruoxi Wang, Qi An, Ningjia Yang, Hiroki Kogami, Kazunori Yoshida, Hiroyuki Hamada, Shingo Shimoda, Hiroshi Yamasaki, Moeka Sonoo, Fady Alnajjar, Noriaki Hattori, Kouji Takahashi, Takanori Fujii, Hironori Otomune, Ichiro Miyai, Atsushi Yamashita and Hajime Asama, Muscle Tension Analysis in Stroke Patient Sit-to-Stand Motion by Joint Torque-Based Normalization, 5th International Conference on NeuroRehabilitation (ICNR2020), 2020.11.
2. Ningjia Yang, Qi An, Hiroki Kogami, Hiroshi Yamakawa, Yusuke Tamura, Kouji Takahashi, Makoto Kinomoto, Hiroshi Yamasaki, Matti Itkonen, Fady Shibata-Alnajjar, Shingo Shimoda, Noriaki Hattori, Takanori Fujii, Hironori Otomune, Ichiro Miyai, Atsushi Yamashita, Hajime Asama, Temporal Features of Muscle Synergies in Sit-to-Stand Motion Reflect the Motor Impairment of Post-Stroke Patients, IEEE Transactions on Neural Systems and Rehabilitation Engineering, 10.1109/TNSRE.2019.2939193, 27, 10, 2118-2127, 2019.10, [URL], Sit-to-stand (STS) motion is an important daily activity, and many post-stroke patients have difficulty performing STS motion. Previous studies found that there are four muscle synergies (synchronized muscle activations) in the STS motion of healthy adults. However, for post-stroke patients, it is unclear whether muscle synergies change and which features primarily reflect motor impairment. Here, we use a machine learning method to demonstrate that temporal features in two muscle synergies that contribute to hip rising and balance maintenance motion reflect the motor impairment of post-stroke patients. Analyzing the muscle synergies of age-matched healthy elderly people ( $n = 12$ ) and post-stroke patients ( $n = 33$ ), we found that the same four muscle synergies could account for the muscle activity of post-stroke patients. Also, we were able to distinguish post-stroke patients from healthy people on the basis of the temporal features of these muscle synergies. Furthermore, these temporal features were found to correlate with motor impairment of post-stroke patients. We conclude that post-stroke patients can still utilize the same number of muscle synergies as healthy people, but the temporal structure of muscle synergies changes as a result of motor impairment. This could lead to a new rehabilitation strategy for post-stroke patients that focuses on activation timing of muscle synergies..
3. Hiroki Kogami, Qi An, Ningjia Yang, Hiroshi Yamakawa, Yusuke Tamura, Atsushi Yamashita, Hajime Asama, Shingo Shimoda, Hiroshi Yamasaki, Matti Itkonen, Fady Shibata-Alnajjar, Noriaki Hattori, Makoto Kinomoto, Kouji Takahashi, Takanori Fujii, Hironori Otomune, Ichiro Miyai, Effect of Physical Therapy on Muscle Synergy Structure during Standing-Up Motion of Hemiplegic Patients, IEEE Robotics and Automation Letters, 10.1109/LRA.2018.2811050, 3, 3, 2229-2236, 2018.07, [URL], Stroke patients suffer from declined physical ability, and it is important to analyze rehabilitation intervention and clarify its effect on the motion of patients. In this study, the effect of intervention on the standing-up motion of stroke patients is investigated. First, the intervention timing of a physical therapist (PT) is analyzed quantitatively from the muscle activity of upper limbs during therapy. Next, the intervention effect is evaluated based on body kinematics and muscle synergy. In this study, twenty trials are conducted, in which the standing-up motion of hemiplegic patients (n=12) is measured with and without the intervention by a PT. The results show that PTs teach hemiplegic patients the timing of lifting their buttocks during standing-up motion. Furthermore, it has been found that this intervention could improve the standing-up motion, although stroke patients had inadequate muscle synergy structure. In particular, some patients had delayed activation of the synergy and they could only stood up after they moved their center of mass toward their feet. However, the intervention by PTs could induce earlier activation of the synergy. Moreover, the intervention could properly shorten the activation duration of muscle synergy for those who had unusually inappropriate longer activation of synergy. These results imply that disordered and inadequate muscle synergy structure can be improved by proper intervention, and this study contributes to the further development of new rehabilitation methodologies..
4. 安琪, 石川雄己, 舩戸徹郎, 青井伸也, 岡敬之, 山川博司, 山下淳, 淺間一, 座面高と速度の異なるヒト起立動作における筋シナジー解析, 計測自動制御学会論文集, 2014.08, In order to understand human motor function, it is necessary to clarify how humans achieve adaptive motions regarding to external environment or their own purpose. This study analyzes human standing-up motion in different chair seat heights and motion speeds using muscle synergy analysis to find important modules to achieve the movement. Muscle synergy is determined from measured eight muscle activations (n=10), and relationship between muscle synergy and body kinematics is clarified. As a result, invariant three muscle synergies were found in human standing-up motion regardless of different seat heights and motion speeds. On the other hand, amplitude and duration of time-varying activation of muscle synergies were properly adujusted to enviromental change. Moreover, it was observed that time-varying activations were strongly corresponded to characteristic kinematic event of standing-up motion. This result implies that humans can achieve the adaptive standing-up motion mainly by controlling time-varying activation of three muscle synergies..
5. Cara E. Stepp, Qi An, Yoky Matsuoka, Repeated training with augmentative vibrotactile feedback increases object manipulation performance, PloS one, 10.1371/journal.pone.0032743, 7, 2, 2012.02, [URL], Most users of prosthetic hands must rely on visual feedback alone, which requires visual attention and cognitive resources. Providing haptic feedback of variables relevant to manipulation, such as contact force, may thus improve the usability of prosthetic hands for tasks of daily living. Vibrotactile stimulation was explored as a feedback modality in ten unimpaired participants across eight sessions in a two-week period. Participants used their right index finger to perform a virtual object manipulation task with both visual and augmentative vibrotactile feedback related to force. Through repeated training, participants were able to learn to use the vibrotactile feedback to significantly improve object manipulation. Removal of vibrotactile feedback in session 8 significantly reduced task performance. These results suggest that vibrotactile feedback paired with training may enhance the manipulation ability of prosthetic hand users without the need for more invasive strategies..
主要総説, 論評, 解説, 書評, 報告書等
主要学会発表等
1. Qi An, Hiroshi Yamakawa, Atsushi Yamashita and Hajime Asama, Temporal Structure of Muscle Synergy of Human Stepping Leg During Sit-to-Walk Motion, 14th International Conference on Autonomous Intelligent Systems (IAS-14), 2016.07.
2. Ruoxi Wang, Qi An, Ningjia Yang, Hiroki Kogami, Kazunori Yoshida, Hiroyuki Hamada, Shingo Shimoda, Hiroshi Yamasaki, Moeka Sonoo, Fady Alnajjar, Noriaki Hattori, Kouji Takahashi, Takanori Fujii, Hironori Otomune, Ichiro Miyai, Atsushi Yamashita and Hajime Asama, Muscle Tension Analysis in Stroke Patient Sit-to-Stand Motion by Joint Torque-Based Normalization, 5th International Conference on NeuroRehabilitation (ICNR2020), 2020.11, Stroke patients exhibit distinct muscle activation features in sit-to-stand motion due to motor deficiency. Muscle activation amplitude is an important feature but has not been clarified due to the lack of a valid normalization method to enable intra-subject comparisons. This study, focusing on the paretic side, examines the change in muscle tension manifested in activation amplitude for a stroke patient in serial measurements by a novel method based on joint torques.We constructed a musculoskeletal model, calculated joint torques by inverse dynamics, and solved muscle activation by forward dynamics simulation. Results showed that tibialis anterior, gastrocnemius, vastus lateralis, rectus abdominis, and erector spinae muscles on the paretic side showed significant improvement in generating maximum muscle tension after a rehabilitation training for 120 days..
学会活動
所属学会名
精密工学会
日本機械学会
日本ロボット学会
計測自動制御学会
IEEE
学会大会・会議・シンポジウム等における役割
2015.12~2015.12, The 6th International Conference on Advanced Mechatronics (ICAM2015), Publication Co-Chair.
2016.05~2016.05, The 1st International Symposium on Embodied-Brain Systems Science (EmboSS2016), Local Arrangement Chair.
2016.12~2016.12, IEEE International Conference on Robotics and Biomimetics (ROBIO2016), Publication Chair.
2017.09~2017.09, IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS2017), Worksho Organizer.
2017.12~2017.12, IEEE/SICE International Symposium on System Integration (SII2018), Program Co-Chair.
2018.09~2018.09, 日本ロボット学会学術講演会, セッションオーガナイザー.
2019.01~2019.01, IEEE International Conference on System Integration (SII2019), Associate Editor.
2019.01~2019.01, 第 31回自律分散システム・シンポジウム, セッションオーガナイザー.
2020.06~2020.06, ロボティクス・メカトロニクス 講演会 2020, プログラム委員.
2021.01~2021.01, IEEE International Conference on System Integration (SII2021), Special Session Organizer.
2020.01~2020.01, IEEE International Conference on System Integration (SII2020), Associate Editor.
2019.09~2019.09, The 1st IFAC Workshop on Robot Control (WROCO2019), Special Session Organizer.
2020.11~2020.11, 幼・小児の成長期における脳機能と運動の発達に関する多領域共同研究, 感じ.
2020.12~2012.12, 第21回計測自動制御学会システムインテグレーション部門講演会, 財務委員長および出版副委員長.
学会誌・雑誌・著書の編集への参加状況
2020.04~2021.07, Advanced Robotics, 国際, 編集委員.
学術論文等の審査
年度 外国語雑誌査読論文数 日本語雑誌査読論文数 国際会議録査読論文数 国内会議録査読論文数 合計
2021年度
2020年度 13 
その他の研究活動
海外渡航状況, 海外での教育研究歴
Technical University of Munich, Germany, 2014.11~2015.03.
University of Washington, UnitedStatesofAmerica, 2010.04~2011.05.
受賞
Student Best Paper Award, ICMA2009 , 2009.08.
2009年度精密工学会秋季大会学術講演会 ベストプレゼンテーション賞, 精密工学会, 2009.09.
計測自動制御学会 論文賞, 計測自動制御学会, 2015.10.
MHS2015 Best Poster Award, MHS2015, 2015.11.
ICAM2015 Honorable Mention, ICAM2015, 2015.12.
船井科学学術振興財団奨励賞, 船井科学学術振興財団, 2016.04.
IAS14 Best Paper Award Finalist, IAS14, 2016.07.
MHS2016 Best Poster Award, MHS2016, 2016.11.
里見賞, 里見賞学会, 2020.01.
ICNR2020 Best Paper Award, ICNR, 2020.11.
研究資金
科学研究費補助金の採択状況(文部科学省、日本学術振興会)
2012年度~2014年度, 基盤研究(B), 連携, 感覚器へのフィードバックを用いて起立不全の予防システムの構築.
2014年度~2018年度, 新学術領域研究(研究領域提案型), 連携, 脳内身体表現のスローダイナミクスモデル.
2016年度~2018年度, 基盤研究(B), 分担, 片麻痺患者の起立動作における筋シナジー構造の同定とリハビリテーション手法の構築.
2019年度~2024年度, 新学術領域研究(研究領域提案型), 分担, 認知・情動に着目した超適応現象のシステム論的理解と実現.
2020年度~2024年度, 基盤研究(A), 分担, 海洋破砕プラスチックごみ回収ロボットシステムに関する研究開発.
2021年度~2025年度, 基盤研究(A), 分担, 自信を持たせる動作支援: 動作予測と体性感覚呈示とモニタリングによる柔らかい支援.
2019年度~2021年度, 挑戦的研究(萌芽), 代表, 片麻痺患者の起立動作の回復過程を計測する手すりの開発.
2018年度~2020年度, 基盤研究(B), 代表, 片麻痺患者への理学療法士の介入の解明とリハビリテーションシステムへの応用.
2015年度~2016年度, 特別推進研究, 代表, 筋の協同発揮に基づくヒトの起立から歩行へ遷移する運動メカニズム.
2012年度~2014年度, 特別研究員奨励費, 代表, 身体情報フィードバックを用いた人の起立運動改善システムの構築.
共同研究、受託研究(競争的資金を除く)の受入状況
2020.09~2022.03, 代表, 立上り支援ロボットの研究開発.
寄附金の受入状況
2021年度, カシオ科学振興財団, 環境と運動速度の異なるヒト起立動作における全身の筋協調構造の解明.
2021年度, 精密測定技術振興財団, 筋シナジーを利用したヒト起立動作の支援装置の開発.
2021年度, 里見奨学会, 片麻痺患者の立ち上がり動作における運動機能を推定する手すりの開発.
2018年度, 永守財団, 筋シナジーを利用した起立動作の支援機器の開発.
2019年度, 永守財団, 筋シナジーを利用した起立動作の支援機器の開発.
2020年度, 永守財団, 筋シナジーを利用した起立動作の支援機器の開発.
学内資金・基金等への採択状況
2021年度~2021年度, 理研-九大科学技術ハブ共同研究プログラム, 代表, 高齢者の運動機能改善のための個人に合わせた適応的な動作支援システムの開発.

九大関連コンテンツ

pure2017年10月2日から、「九州大学研究者情報」を補完するデータベースとして、Elsevier社の「Pure」による研究業績の公開を開始しました。
 
 
九州大学知的財産本部「九州大学Seeds集」