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Piston Finger Device for Restoring the Motor Function of Chronic Plegic Fingers
Mengsu Wang,Hirofumi Tanabe,Kenji Ooka,Yoshifumi Morita,Yukio Kobayashi,Hiroyuki Daiko,Takafumi Iziri,Naoki Kiriyama 제어로봇시스템학회 2017 제어로봇시스템학회 국제학술대회 논문집 Vol.2017 No.10
A piston finger technique (PFT) was developed for restoring the motor function of chronic plegic fingers with good outcomes, including reduced spasticity and improved muscle shortening. In our previous work, we analyzed finger motions during treatment with the PFT using a motion capture system. Based on the motion analysis results of treatment with the PFT, we determined the required specifications for a piston finger device (PFD). In this study, we developed a PFD utilizing a crank mechanism. We conducted treatment with the PFD on five patients with chronic plegic fingers. The assessment results based on the Modified Ashworth Scale, the Fast Passive Stretch, and the Passive-ROM (Range Of Motion) before and after treatment with the PFD showed that motor function was improved and abnormal muscle tone had decreased. Therefore, the effectiveness of treatment with the PFD was verified.
Da Shuhan,Hirofumi Tanabe,Yoshifumi Morita,Zhou Peichen 제어로봇시스템학회 2019 제어로봇시스템학회 국제학술대회 논문집 Vol.2019 No.10
Biofeedback systems have been developing rapidly in recent years as rehabilitation methods for hemiplegic stroke patients. To investigate the value of such systems for the rehabilitation of these patients, we complemented the Useful and Ultimate Rehabilitation System PARKO (UR-System-PARKO) with a biofeedback system that had an A-BA- B design, to see if together, patients saw more improvement in a shorter timespan in the control of the extensor muscles in their hands. The biofeedback system was tested without therapist participation. We evaluated the effectiveness of each training trial by recording electromyography (EMG) signals for the extensor and flexor digitorum muscles. By comparing the EMG values from each trial, we were able to conclude that the training with the UR-System-PARKO became more effective when the biofeedback system was applied. This also demonstrated that, by using a biofeedback system, it would be possible for stroke hemiplegic patients to conduct highly efficient self-rehabilitation.
Verification of Therapeutic Effect of a Piston Device for Foot with Spastic Paralysis
Nguyen Thi Kieu Chinh,Hirofumi Tanabe,Kenji Ooka,Yoshifumi Morita,Yukio Kobayashi,Takafumi Ijiri 제어로봇시스템학회 2019 제어로봇시스템학회 국제학술대회 논문집 Vol.2019 No.10
The second author has developed a piston technique for restoring the motor function of a chronic plegic foot with good outcomes, including reduced spasticity and improved muscle shortening. In this study, we developed a piston device for foot (PDFt) to simulate the piston technique. The PDFt moves the paralyzed foot passively. We considered the therapeutic effects as well as new findings in treatment with the PDFt. We conducted treatment with the PDFt for five minutes on each of six hemiplegic persons. The therapeutic effect was assessed by measuring the passive range of motion, the active range of motion, and the Modified Ashworth Scale score before and after treatment. The use of the PDFt led to improved motor function and decreased abnormal muscle tone. Therefore, the effectiveness of treatment with the PDFt was verified. Moreover, we conducted a 5-Meter Walk Test before and after treatment for one hemiplegic person and performed a gait analysis. It was confirmed that the treatment also had a good effect on the improvement of gait.
Rehabilitation Support Robot for Self-Standing-Up Training of Hemiplegic Stroke Patients
Masateru Saito,Mizuki Kitamura,Yoshifumi Morita,Hirofumi Tanabe,Yukio Kobayashi,Takafumi Iziri,Hiroyuki Daiko,Naoki Kiriyama 제어로봇시스템학회 2017 제어로봇시스템학회 국제학술대회 논문집 Vol.2017 No.10
The objective of the study involves developing a rehabilitation support robot for self-standing-up training of hemiplegic stroke patients to restore normal standing-up motion. Therapist-guided standing-up training is effective in improving the motor function of a patient’s paralyzed leg. The therapist controls a patient’s left/right load balance by pulling or pushing the patient’s waist during standing-up training. Hence, we investigated the relationship between the patient’s waist movement and the left/right load balance during guided standing-up motion. The analysis results revealed the ideal pattern of the load balance ratio during guided standing-up training. In addition, the results indicate that the patient’s waist movement corresponded to the ideal pattern of the load balance ratio. It is expected that this movement trajectory is useful in designing a controller of a rehabilitation support robot. In order to reproduce the therapist-guided standing-up training with a rehabilitation support robot, it is necessary to consider a control method that can be installed on the robot.
Ai Nakamura,Zhou Peichen,Yoshifumi Morita,Hirofumi Tanabe 제어로봇시스템학회 2021 제어로봇시스템학회 국제학술대회 논문집 Vol.2021 No.10
Applying an external force to a person’s hyperextended fingertip produces electrical activity of the extensor digitorum muscle even when the hand is not opened by the person. Based on this, a finger extensor facilitation technique has been developed for hemiplegic patients who cannot open the paralyzed hand by themselves. In this study, we developed a finger extensor facilitation training device named “iPARKO” that imitates this technique. We examined the factors that promote activities in the extensor digitorum muscle by conducting active training using iPARKO. Experiments were conducted on a healthy person and a hemiplegic person. It was found that active training using iPARKO leads to activities in the extensor digitorum muscle even in a hemiplegic person who cannot open their hand. In addition, it was found that a hemiplegic person can increase muscle activity by pressing their hand movement and utilizing electromyography biofeedback. The hand movement was clarified as follows: the hemiplegic person pressed the hand against the moving part of the device and pushed the fingertip further into it as a voluntary movement to increase the amount of muscle activity.