• Title, Summary, Keyword: Motor recovery

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The Study of the Changes of Mirror Movements with Upper Extremity on Stroke Patients (뇌졸중 환자에서 상지의 경상 운동의 변화 연구)

  • Chang, Jong-Sung;Lee, Mi-Young;Kim, Chung-Sun
    • Journal of the Korean Society of Physical Medicine
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    • v.3 no.4
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    • pp.269-276
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    • 2008
  • Purpose : The purpose of this study was to evaluate the effects of mirror movements(MM) on upper extremity's function and measure the change of MM on stroke patients depending on the elapse of time. Methods : Sixteen stroke patients with MM and Sixteen stroke patients without MM were recruited for this study. Intended movements and MM were measured by two dynanometers of MP150 system(BIOPAC System Inc., Santa Barbara, U.S.A). The upper extremity's motor function was measured using manual function test(MFT), Fugl-Meyer assesment(FMA). Results : The change rates of upper extremity's motor function test showed significant group differences in FMA but not in MFT between the patients with MM and without MM from the first test to the second test. In each group motor function generally more increased. The magnitudes of MM decreased from the first test to the second test. Conclusion : These results indicate that stroke patients with MM have a significant motor deficit. But motor deficit could be recovered by spontaneous recovery or treatments and a clinical sign of MM was improved. In the future, we suggest that studies of assessments of MM after rehabilitation and treatment interventions of MM on stroke patients.

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Sensorless Control of Non-salient Permanent Magnet Synchronous Motor Drives using Rotor Position Tracking PI Controller

  • Lee Jong-Kun;Seok Jul-Ki
    • KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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    • v.5B no.2
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    • pp.189-195
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    • 2005
  • This paper presents a new velocity estimation strategy for a non-salient permanent magnet synchronous motor drive without high frequency signal injection or special PWM pattern. This approach is based on the d-axis current regulator output voltage of the drive system, which contains the rotor position error information. The rotor velocity can be estimated through a rotor position tracking PI controller that controls the position error at zero. For zero and low speed operation, the PI gain of the rotor position tracking controller has a variable structure according to the estimated rotor velocity. Then, at zero speed, the rotor position and velocity have sluggish dynamics because the varying gains are very low in this region. In order to boost the bandwidth of the PI controller during zero speed, the loop recovery technique is applied to the control system. The PI tuning formulas are also derived by analyzing this control system by frequency domain specifications such as phase margin and bandwidth assignment.

Speed Control of an Overcentered Variable-Displacement Hydraulic Motor on a Constant Pressure Network (일정 압력원에 연결된 가변유압모터의 속도제어)

  • 김철수;이정오
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • pp.272-276
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    • 1996
  • This study deals with the speed control of an overcentered variable-displacement hydraulic motor on a constant pressure network, which is noted for its high system efficiency fast dynamic response and energy recovery capability. The speed control characteristics of the conventional cascade PI controller are largely affected by load-torque disturbances. To obtain robust speed control despite torque disturbances, the load torque is estimated by an observer based on a mathematical model and compensated for by a feedforward loop. It is shown by experiment that robust speed control may be obtained with the proposed controller. The experimental data agree fairly well with the theoretical analysis.

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Transcallosal Ipsilateral Motor Pathway from the Unaffected Hemisphere in a Patient with Traumatic Brain Injury

  • Jang, Woo-Hyuk;Lee, Mi-Young;Kwon, Yong-Hyun;Jang, Sung-Ho
    • The Journal of Korean Physical Therapy
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    • v.26 no.3
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    • pp.216-219
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    • 2014
  • Purpose: We presented with a patient with traumatic brain injury who showed a transcallosal ipsilateral motor pathway from unaffected motor cortex to affected extremities, as evaluated by diffusion tensor tractography (DTT). Methods: One patient and six age-matched normal subjects were enrolled. A 42-year-old left hemiparetic male who suffered from brain injury by motor vehicle accident 9 years ago showed a leukomalactic lesion in the right corona radiata and parieto-temporal lobe. His left extremities were completely paralyzed initially, but recovered slowly over 2 years. At the time of the evaluation, he was able to grasp and release an object, and to walk with spastic gait pattern. DTT was performed using 1.5 T with a Synergy-L Sensitivity Encoding head coil. DTT was obtained with termination criteria of FA <0.2 and an angle change > $45^{\circ}c$. Results: The motor tracts of the unaffected (left) hemisphere of the patient and control subjects originated from the motor cortex and descended along the known corticospinal tract without any transcallosal tract. By contrast, the tract of the affected (right) hemisphere originated from the left premotor cortex, descended through the left corona radiata, and then crossed the mid-portion of the corpus callosum. The tract then descended through the known corticospinal tract pathway to the right medulla. Conclusion: We conclude that the transcallosal ipsilateral motor pathway from the unaffected hemisphere appeared to contribute to the motor recovery in this patient.

Case Report: The Effects of Electromyogram-Triggered Neuromuscular Stimulation In the Treatment of Guillain-Barre Syndrome (Guillain-Barre syndrome 환자의 근전도 유발 신경근 전기자극을 이용한 운동회복효과 - 사례연구 -)

  • Kim, Sun-Ho
    • Therapeutic Science for Rehabilitation
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    • v.3 no.1
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    • pp.39-45
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    • 2014
  • Objective : The purpose of this study was to investigate the efficacy of electromyogram-triggered neuromuscular stimulation in the treatment to Guillain-Barre Syndrome patients of through case Study. Methods : The subject was a 66-year old woman who has Guillain-Barre Syndrome, showed wrist and hand function decrease in FMA and JTHFT investigation. She received a electromyogram-triggered neuromuscular stimulation treatment for 4weeks, 1 per day, 30 minute for each(right, left). Results : After 4 week period, wrist and hand function of FMA was observed increase and JTHFT showed improvement in some items. Conclusion : The use of electromyogram-triggered neuromuscular stimulation in the treatment of Guillain-Barre Syndrome who had peripheral neuropathy could been effective to therapy for motor recovery.

Challenges in neuro-machine interaction based active robotic rehabilitation of stroke patients

  • Song, Aiguo;Yang, Renhuan;Xu, Baoguo;Pan, Lizheng;Li, Huijun
    • Advances in robotics research
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    • v.1 no.2
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    • pp.155-169
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    • 2014
  • Study results in the last decades show that amount and quality of physical exercises, then the active participation, and now the cognitive involvement of patient in rehabilitation training are known of crux to enhance recovery outcome of motor dysfunction patients after stroke. Rehabilitation robots mainly have been developing along this direction to satisfy requirements of recovery therapy, or focusing on one or more of the above three points. Therefore, neuro-machine interaction based active rehabilitation robot has been proposed for assisting paralyzed limb performing designed tasks, which utilizes motor related EEG, UCSDI (Ultrasound Current Source Density Imaging), EMG for rehabilitation robot control and feeds back the multi-sensory interaction information such as visual, auditory, force, haptic sensation to the patient simultaneously. This neuro-controlled and perceptual rehabilitation robot will bring great benefits to post-stroke patients. In order to develop such kind of robot, some key technologies such as noninvasive precise detection of neural signal and realistic sensation feedback need to be solved. There are still some grand challenges in solving the fundamental questions to develop and optimize such kind of neuro-machine interaction based active rehabilitation robot.

Effect of Comprehensive Korean Medicine with Rehabilitation in Stroke Patients: A Retrospective Study (뇌졸중 환자의 재활에서 포괄적인 한방치료의 효과: 후향적 연구)

  • Kim, Min Su;Moon, Byung Soon
    • Journal of Physiology & Pathology in Korean Medicine
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    • v.30 no.5
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    • pp.355-359
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    • 2016
  • This study is to investigate the effect of the level of Korean medical intervention (KMI) on the recovery of activity of daily living (ADL) and the motor function in patients with stroke. A total of 43 stroke patients were recruited. The participants were divided into two groups, the basic Korean medical intervention (BKM) and the comprehensive Korean medical intervention (CKM) group. The patients in BKM group were treated with the basic acupuncture and the consultation of Korean medicine doctors. The treatments of CKM group patients included the comprehensive herbal medical therapies in addition to the treatments of BKM group. The western rehabilitation therapies were performed in all participants with KMI. The functional outcomes using modified Barthel Index of Korean version (K-MBI) and Fugl-Meyer assessment (FMA) were analyzed before and after the treatment between two groups. Significant differences between the BKM and the CKM group were demonstrated in both K-MBI and FMA (p<0.05). There were significant relationships between the level of the KMI and K-MBI/FMA (p<0.05). In conclusion, the comprehensive KMI was more effective to improve the ADL and motor function in patients with the stroke east-west integrative medical care.

Revision Superficial Temporal Artery-Middle Cerebral Artery Bypass Surgery for Recurrent Acute Ischemic Stroke Due to Delayed Occlusion of the Bypass Graft

  • Choi, Yun-Hee;Park, Hyun-Seok;Kang, Myong-Jin;Cha, Jae-Kwan
    • Journal of Cerebrovascular and Endovascular Neurosurgery
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    • v.20 no.2
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    • pp.127-132
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    • 2018
  • Intravenous thrombolysis (IVT) and endovascular treatment (EVT) are currently the main treatments for reperfusion in acute ischemic stroke. Although the EVT recanalization rate has increased, unsuccessful recanalization is still observed in 10-30% cases. Superficial temporal artery-middle cerebral artery (STA-MCA) bypass is considered a rescue therapy in such cases, but in most centers it is not usually performed for acute ischemic stroke. Graft occlusion is rare following STA-MCA bypass, but it might lead to recurrent ischemic stroke. We hereby report on a patient with right MCA infarction and in whom EVT failed due to complete proximal internal carotid artery occlusion. He underwent an emergency STA-MCA bypass, resulting in a full recovery of his motor weakness. However, six months later, the patient experienced recurrent acute ischemic stroke due to bypass graft occlusion. His EVT failed again but revision bypass surgery, using STA remnant branch, was successful with full motor weakness recovery. We recommend a revision bypass surgery as a feasible therapeutic option for recurrent cerebral infarction caused by delayed STA graft occlusion.

The Effect of Questions for Internal feedback on Functional Recovery and Task performance in chronic stroke patients (내재적 피드백을 위한 질문이 만성 뇌졸중 환자의 기능회복과 과제수행에 미치는 영향)

  • Sun, Hwa-Jung;Kim, Hee-Soo;Woo, Ji-Hea;You, Young-Youl
    • Journal of Korean Academy of Medicine & Therapy Science
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    • v.10 no.2
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    • pp.21-30
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    • 2018
  • Objective: The purpose of this study was to investigate questions and instructions for internal feedback effects on functional recovery and task performance while chronic stroke patients practised task-specific training. Method: Twenty-four chronic stroke patients were randomly divided into two groups; when patients performed same tasks, one was treated using questions and the other using instructions for internal feedback Both lasted 30 minutes, 5 times a week for 8 weeks. Outcome measures included Erasmus MC Modifications to the Nottingham Sensory Assessment (EmNSA), Measurement Properties of the Motor Evaluation Scale for Upper Extremity in Stroke patients (MESUPES), Chedoke Arm and Hand Activity Inventory (CAHAI), Korean version of Modified Barthel Index (K-MBI). Results: There were no significant differences between the two groups in EmNSA and K-MBI(p>.05). But, in MESUPES and CAHAI, there was significant difference between the two groups(p<.05). Conclusion: In this study, questions for internal feedback during task-specific training are more effective in improving upper extremity motor function and task performance than instructions for internal feedback.

The Effects of Treadmill Exercise on the Recovery of Functional Capacity in Spinal Cord Injured Rats (트레드밀 운동이 척수손상 백서의 운동기능 회복에 미치는 효과)

  • Chun, Jin-Sung;Kim, Tae-Youl;Nam, Ki-Won;Kim, Young-Eok;Oh, Myung-Hwa;Kim, Kyoung-Yoon;Kim, Eun-Jung;Lee, Jae-Choon;Jang, Mee-Kyung;Choi, Hyun-Seok;Heo, Myung;Kim, Gye-Yeop
    • The Journal of Korean Physical Therapy
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    • v.19 no.4
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    • pp.15-24
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    • 2007
  • Purpose: This study was designed to investigate the effects of treadmill exercise on functional recovery after rat with experimental SCI. Methods: SCI was induced by the NYU-spinal cord impactor(NYU, USA) dropped a weight of 10 gm after laminectomy. Experimental groups were divided into the Group I (normal), Group II (control) and Group III(treadmill exercise). After 2 days of the operation, 24 rats(group II, III) were trained to walk on treadmill for 21 days twice/day, 15 min/session. After operation, rats were tested at modified Tarlov scale at 1, 2, 3, 4 days with divided into 2 groups, and Motor behavior test(BBB locomotor rating scale, Grid walking test, Narrow beam crossing test, Modified inclined plane test) was examined at 1, 3, 7, 14 and 21 days. Histopathological study were performed at 1. 3, 7, 14 and 21 days by H&E, Luxol Fast Blue staining were same times. Results: After SCI an improvement of motor behavior was shown group II, III. The motor behavior test of group Ill showed considerable improvement until 14 days. Conclusion: These results suggest that treadmill exercise treatment can playa role in facilitating recovery of locomotion following spinal cord injury.

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