• Title/Summary/Keyword: Motor recovery

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Sungshim-san-mediated Recovery of Cognition and Motor Function in the Severe Rat Stroke, Permanent Middle Cerebral Artery Occlusion Model (성심산(醒心散)의 중대뇌동맥 폐쇄로 유발된 허혈성 뇌손상 백서(白鼠)에 대한 인지 및 운동기능 회복 촉진효과)

  • Lee, Kyung-Seok;Chung, Dae-Kyoo
    • Journal of Oriental Neuropsychiatry
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    • v.26 no.3
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    • pp.319-336
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    • 2015
  • Objectives: The object of this study was to evaluate the cognition and motor function recovery effects of Sungshim-san (SSS), a traditional Korean cardio-protective polyherbal formula in the severe rat stroke, permanent middle cerebral artery occlusion (pMCAO) model. Methods: The experimental animals were divided into 6 groups. SSS aqueous extracts (yield=16.82%; 400, 200 and 100 mg/kg) were administered orally by using Sonde, once daily, for 28 continuous days from 24 hrs post-pMCAO. Donepezil 10 mg/kg, a representative drug for dementia, was used as a reference drug. The body weight changes, infarct/defect sizes, sensorimotor function and cognitive motor behavior were serially monitored. Limb placing and body-swing test for sensorimotor functions were conducted at 1 day before operation (base line), and 1, 3, 7, 14, 21 and 28 days post-pMCAO; and water maze test for the cognitive motor behavior was conducted at 14 and 28 days post-pMCAO, respectively. Results: Focal cerebral cortex infarct and defects due to pMCAO resulted in marked decreases of body weight, disorders of sensorimotor functions and cognitive motor behaviors. However, the pMCAO-related ischemic damages were markedly and dose-dependently inhibited by treatment with SSS 400 and 200 mg/kg, respectively. Donepezil markedly decreased the body weight and gains, as compared with pMCAO control rats; however, SSS 400 and 200 mg/kg favorably ameliorated the pMCAO-induced decreases in body weight and gains. SSS 100 mg/kg treated rats did not show any favorable effects on the pMCAO-related ischemic damages, as compared with pMCAO control rats. Conclusions: The results of the study indicated that oral administration of SSS 400 and 200 mg/kg accelerated cognition and motor function recovery in the rat pMCAO model. The treatment effect was potentially mediated by neuroprotection via the known augmentation of cerebral antioxidant defense system of SSS itself or its individual herbal components. Especially, the overall effects of SSS 200 mg/kg were similar to those of donepezil 10 mg/kg, but less toxic.

Feasibility of Virtual Reality for Enhancement of Upper Extremity Function Post Stroke (작업치료 임상에서 뇌졸중 환자의 상지기능 향상을 위한 가상현실 치료의 유용성에 관한 고찰)

  • Kwon, Jae-Sung;Yang, No-Yul
    • Therapeutic Science for Rehabilitation
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    • v.1 no.2
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    • pp.35-40
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    • 2012
  • The purpose of this review was to investigate feasibility of intensive virtual reality training to improve upper extremity function with brain plasticity of individuals with stroke through the literature. The recovery of the paretic upper extremity depends on regularity and intensity of training as use-dependent plasticity. In resent, virtual reality program has been widely used in the occupational therapy field of augmented stroke rehabilitation. There is a growing body of evidence that virtual reality training of the paretic extremity induces brain plasticity associated with motor improvement. In terms of therapeutic feasibility to improve paretic upper extremity, recent research has explored several important factors of virtual reality training for recovery of upper extremity motor function. These factors include high repetition intensity, high motivation like type of game, enhanced multisensory feedback regarding performance, and interactive task-oriented training. Therefore, occupational therapy combined with intensive and repetitive virtual reality training will enhance recovery of upper extremity motor function after stroke.

Angle Control for SRCI Fed Induction Motor Drive (SRCI 구동 유도전동기 시스템의 Angle Control)

  • 김인동;조규형
    • The Transactions of the Korean Institute of Electrical Engineers
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    • v.37 no.12
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    • pp.854-861
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    • 1988
  • The current source inverter-fed induction motor(CSIM) drive is widely used in industry because of its four quadrant operation, fuseless protection, fuseless protection, and ruggedness. the CSIM drive system, however, has shortcomins such as slow response and dynamic stability to load torque disturbance and reference speed change. Such a disadvantages can be compensated considerably by means of introducing additional angle angle control loop. The angle control method is dependent upon the inverter type. In this paper, simultaneus recovery and commutation inverter(SRCI) which is developed recently is considered.

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Multi-Level Inverter for Regenerative Breaking of SRM (SRM의 회생제동을 위한 멀티레벨 인버터)

  • Lee S. H.;Ahn G. S.;Park S. J.;Ahn J. W,
    • Proceedings of the KIPE Conference
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    • pp.239-242
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    • 2001
  • Energy recovery in the regenerative region is very important when SRM(Switched Reluctance Motor) is used in traction drive. This is because that to reduce energy toss during mechanical breaking and/or to have a high efficiency drive during breaking. To control excitation voltage in motor operation and regenerative voltage in the generator operation in the SRM, multi-level voltage control is effective. This paper proposes multi-level inverter which is useful for motoring and regenerative operation in SRM. The proposed method is verified by experiment.

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5-Level Inverter for Excitation Voltage Control of SRM (SRM의 여자전압제어를 위한 5-레벨 인버터)

  • Lee, S.H.;Park, S.J.;Ahn, J.W.
    • Proceedings of the KIEE Conference
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    • pp.294-296
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    • 2000
  • Energy recovery in the regenerative region is very important when SRM(Switched Reluctance Motor) is used in traction drive. This is because that to reduce energy loss during mechanical braking and/or to have a high efficiency drive during braking. To control excitation voltage in motor operation and regenerative voltage in the generator operation in the SRM, multi-level voltage control is effective. This paper suggests multi-level inverter which is useful for motoring and regenerative operation in SRM.

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Current Research Trend on Acupuncture Treatment for Nerve Regeneration and Recovery: Based on the Data of PubMed (침 치료가 신경 재생 및 회복에 미치는 영향에 대한 연구 동향: PubMed를 중심으로)

  • Yang, Mi-Sung;Kim, Sun-Jong;Choi, Jin-Bong
    • Korean Journal of Acupuncture
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    • v.31 no.4
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    • pp.147-157
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    • 2014
  • Objectives : The purpose of this study is to explore the current research trend on acupuncture treatment for nerve regeneration and recovery effect. Methods : We investigated the researches so far, on acupuncture treatment for the nerve regeneration and recovery via searching Pubmed from 2005 up to October 2014. Data were extracted from the included studies regarding the authors, countries, type of nerve injury, type of acupuncture, treatment period, acupuncture points, assessment tool and results. Results and Conclusions : Twenty-four research papers were included in the review. Outcomes were measured by immunohistochemical results, motor behavior scores, and electrocphysiological results. All but one study favored acupuncture and electroacupuncture treatment for nerve regeneration and recovery regardless of type of nerve injury and acupuncture modality. Acupuncture treatment may have a potential for nerve regeneration and recovery and further research is required.

Investigation of the impact of Voltage Sags on 3-Phase Induction Motors Considering Reclosing Interval in Distribution System (리클로징 시간을 고려한 배전계통 순간전압강하의 3상 유도전동기에 미치는 영향 검토)

  • Kang Bong Seok;Kim Jae Chul;Moon Jong Fil;Yun Sang Yun
    • Proceedings of the KIEE Conference
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    • pp.45-47
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    • 2004
  • This paper describes the various characteristics of voltage sags which can affect the functions of three-phase induction motors that are mostly used in the power distribution systems. These assorted characteristics include motor speed losses, voltage recovery, motor reacceleration, and transient characteristics. An experimental study on the induction motor behaviors was also carried out to confirm these impacts. In addition, sequential voltage sags with short durations were considered and investigated. The results show that the occurrence of the second voltage sag after the first one may affects the induction motor adversely.

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Investigation of the Impact of Voltage Sags on 3-Phase Induction Motors (순간전압강하가 3상 유도전동기에 미치는 영향 검토)

  • Kang, Bong-Seok;Kim, Jae-Chul;Moon, Jong-Fil;Yun, Sang-Yun
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • pp.361-365
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    • 2004
  • This paper describes the various characteristics of voltage sags which can affect the functions of three-phase induction motors that are mostly used in the power distribution systems. These assorted characteristics include motor speed losses, voltage recovery, motor reacceleration, and transient characteristics. An experimental study on the induction motor behaviors was also carried out to confirm these impacts. In addition sequential voltage sags with short durations were considered and investigated. The results show that the occurrence of the second voltage sag after the first one may affects the induction motor adversely.

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Investigation of the Impact of Voltage Sags and Temporary Interruptions on 3-Phase Induction Motors (배전계통 순간전압강하 및 순간정전이 3상 유도전동기에 미치는 영향 검토)

  • Kang, Bong-Seok;Kim, Jae-Chul;Moon, Jong-Fil;Yun, Sang-Yun
    • Proceedings of the KIEE Conference
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    • pp.106-109
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    • 2003
  • This paper describes the various characteristics of voltage sags and temporary interruptions which can affect the functions of 3-phase induction motors. These assorted characteristics include motor speed loss, voltage recovery, motor reacceleration, and transient characteristics. An experimental study on induction motor behavior was also carried out to confirm these impacts. Besides, sequential voltage sags of short duration were considered for this paper. The results show that the occurrence of the second voltage sag after the first one may affects the induction motor adversely.

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A Comparative Study of Motor Recovery from Stroke between High and Low Frequency Electrical Acupoint Stimulation (뇌경색 환자의 운동장애에 대한 주파수별 전침치료효과의 비교)

  • Kim, Young-Suk;Jung, Woo-Sang;Na, Byung-Jo;Park, Seong-Uk;Moon, Sang-Kwan;Park, Jung-Mi;Ko, Chang-Nam;Cho, Ki-Ho;Bae, Hyung-Sup;Hong, Jin-Woo
    • The Journal of Korean Medicine
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    • v.28 no.3
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    • pp.289-298
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    • 2007
  • Objectives : Electrical acupoint stimulation (EAS) has been used to treat motor dysfunction of stroke patients with reportedly effective results. The purpose of this study was to evaluate the efficacy of EAS with different frequencies in treating motor dysfunction of ischemic stroke patients. Methods : The subjects of this study were sixty-two ischemic stroke patients with motor dysfunction at Kyunghee Oriental Medicine Hospital who were hospitalized for one week to one month from onset. They were treated with 2Hz or 120Hz EAS for two weeks, and motor evoked potentials (MEP) were measured before and after EAS treatment. To compare the effect of 2Hz EAS with 120Hz, we measured latency, central motor conduction time (CMCT) and amplitude of MEP before and after EAS treatment. Results : After two weeks of treatment, we compared MEP data of the affected side between the 2Hz group and the 120Hz group. The 2Hz group showed more significant improvement than the 120Hz group in latency, CMCT and amplitude (P=0.008, 0.002, 0.002). In case of the affected side MEP data divided by normal side MEP data, the 2Hz group also showed improvement on latency, CMCT and amplitude with significant differences (P=0.003, 0.000, 0.008). Conclusions : These results suggest that low frequency EAS activates the central motor conduction system better than high frequency EAS, and it means that EAS with low frequency is more helpful for motor recovery after ischemic stroke than that with high frequency.

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