• Title, Summary, Keyword: Knee

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여자 배구 선수들의 스파이크 도약 시 무릎보호대가 전방십자인대 부상위험 요인에 미치는 영향 (Effects of Knee Brace on the Anterior Cruciate Ligament Injury Risk Factors during Spike Take Off in Female Volleyball Players)

  • 양창수;임비오
    • 한국운동역학회지
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    • v.24 no.1
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    • pp.27-33
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    • 2014
  • In volleyball, the most common injuries are anterior cruciate ligament (ACL) tears. For this reason, volleyball players frequently use knee brace as prophylactic and rehabilitation measures. The purpose of the study was to investigate the effects of knee brace on anterior cruciate ligament injuries risk factors during spike take off in female volleyball players. Fifteen female volleyball players were recruited and performed randomly spike take off with and without knee brace. Kinematics and ground reaction data were collected to estimate the anterior cruciate ligament injuries risk factors. The ACL risk factors are knee maximum flexion angle, thigh maximum adduction angle, thigh maximum internal rotation angle, shank maximum abduction angle, shank maximum external rotation angle, knee maximum extension moment and knee maximum abduction moment. Data were analyzed with paired samples t-test with Bonfferoni collection. Female volleyball players with knee brace had no significant results in knee maximum flexion angle, thigh maximum adduction angle, thigh maximum internal rotation angle, shank maximum abduction angle and shank maximum external rotation angle compare to without knee brace. Female volleyball players, however, with knee brace showed more reduced knee maximum extension moment and knee maximal abduction moment than without knee brace. In conclusion, Female volleyball players with knee brace reduced anterior cruciate ligament stress.

퇴행성슬관절염 환자의 통증에 대한 연구 (Pain Evaluation in Patients with Knee Osteoarthritis)

  • 윤대연
    • 동의생리병리학회지
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    • v.25 no.4
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    • pp.715-720
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    • 2011
  • We performed this study to assess pain in patients with knee osteoarthritis. Participants were 120 Patients(men 26 and women 94) with knee osteoarthritis. Pain evaluations were conducted using survey composed of 12 items by interview with oriental medicine doctor. Collected data were analyzed by IBM SPSS Statistics 19.0. Women were 3.8 times more than men(21.7% vs 78.3%). Approximately 80% of participants were overweight and obesity. Descending stair is most painful action for knee osteoarthritis patients. The average degree of knee pain was more than moderate. 5. People diagnosed as arthritis before had the much higher knee pain than never diagnosed before. This study showed female gender, overweight and obesity were associated with the risk of knee arthritis and participants complained knee pain more than moderate. It is hoped that our findings provide information that help the treatment of knee osteoarthritis.

발목관절 자세 변화에 대한 무릎관절 굽힘근과 폄근의 활성도 (Activity of Knee Flexors and Extensors on Change of Ankle Joint Position)

  • 권유정;이현옥
    • PNF and Movement
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    • v.11 no.2
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    • pp.111-117
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    • 2013
  • Purpose : The purpose of this study was to examine the activity of the knee flexor and extensor with ankle plantar flexion and dorsiflexion. Methods : A total of 18 subjects(Male 6, female 12) performed 4 lower extremity patterns of PNF and the activities of the vastus medialis oblique, rectus femoris, vastus lateralis, biceps femoris, semitendinosus ipsilateral sides were measured using electromyography. Results : During 4 lower extremity patterns of PNF, knee flexor and extensor muscle activity were significantly difference. Knee extensors were shown to be higher knee extension and ankle dorsiflexion combined pattern. Knee flexors were shown to be higher knee flexion and ankle plantarflexion combined pattern. Conclusion : We suggest that it is efficient to strengthening of knee extensors with ankle dorsiflexion and to strengthening of knee flexors with ankle plantar flexion. Also, for the functioning as toe standing, we have to choice appropriate movement pattern.

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On the characteristics and seismic study of Hat Knee Bracing system, in steel structures

  • JafarRamaji, Issa;Mofid, Massood
    • Steel and Composite Structures
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    • v.13 no.1
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    • pp.1-13
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    • 2012
  • In this study, a new structural bracing system named 'Hat Knee Bracing' (HKB) is presented. In this structural system, a special form of diagonal braces, which is connected to the knee elements instead of beam-column joints, is investigated. The diagonal elements provide lateral stiffness during moderate earthquakes. However the knee elements, which is a fuse-like component, is designed to have one plastic joint in the knee elements for dissipation of the energy caused by strong earthquake. First, a suitable shape for brace and knee elements is proposed through elastic studying of the system and several practical parameters are established. Afterward, by developing applicable and highly accurate models in Drain-2DX, the inelastic behavior of the system is carefully considered. In addition, with inelastic study of the new bracing system and comparison with the prevalent Knee Bracing Frame system (KBF model) in nonlinear static and dynamic analysis, the seismic behavior of the new bracing system is reasonably evaluated.

슬관절 전치환술용 3차원 시술변수 추출 시스템 (A Simulation System of Total Knee Replacement Surgery for Extracting 3D Surgical Parameters)

  • 전용태
    • 한국CDE학회논문집
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    • v.16 no.5
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    • pp.315-322
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    • 2011
  • The goal of total knee replacement (TKR) surgery is to replace patient's knee joint with artificial implants in order to restore normal knee joint functions. Since mismatched knee implants often cause a critical balancing problem and short durability, designing a well-fitted implant to a patient's knee joint is essential to improve surgical outcomes. We developed a software system that three-dimensionally (3D) simulates TKR surgery based upon 3D knee models reconstructed from computed tomography (CT) imaging. The main task of the system was to extract precise 3D anatomical parameters of a patient's knee that were directly used to determine a custom fit implant and to virtually perform TKR surgery. The virtual surgery was simulated by amputating a 3D knee model and positioning the determined implant components on the amputated knee. The test result shows that it is applicable to derive surgical parameters, determine individualized implant components, rehearse the whole surgical procedure, and train medical staff or students for actual TKR surgery. The feasibility and verification of the proposed system is described with examples.

전신조정술의 맨손 중재와 자가교정운동 모형이 휜 다리의 교정에 미치는 영향 (The Effects of the Manual Intervention and Self Corrective Exercise Models of General Coordinative Manipulation on the Distorsional Leg)

  • 김윤서;문상은
    • 대한통합의학회지
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    • v.3 no.1
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    • pp.29-39
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    • 2015
  • Purpose: The purpose of this study was to analyze the effect of the manual intervention and self corrective exercise models of GCM(General Coordinative Manipulation) on the groups bow-knee and knock-knee. Methods: GCM Center of 23 members were divided into the two different groups. 12 members of group bow-knee and 11 members of group knock-knee applied to each manual intervention and self corrective exercise models of GCM. Two different groups were applied to 1 cycle a day for 4 weeks, 3 times a week. Results: The effect of manual intervention and self corrective exercise models of GCM on the groups bow-knee and knock-knee was significant(z<.05). The relationship between groups bow-knee and knock-knee was no significant(z>.05). Conclusion: the manual intervention and self corrective exercise models of GCM was contributed in the Correct recovery of bow-knee and knock-knee(z<.05).

유동모드 MR 댐퍼가 구비된 대퇴의족의 설계 및 해석 (Design and Analysis of Above Knee Prosthetic Leg Using MR Damper)

  • 박진혁;강제원;최승복
    • 한국소음진동공학회논문집
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    • v.26 no.2
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    • pp.165-171
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    • 2016
  • A prosthetic knee for above-knee (AK) amputee is categorized into passive and active type. The passive prosthetic knee is generally made by elastic material. Although AK amputee can easily walk by using passive prosthetic leg, knee joint motions are not similar to ordinary persons. The active prosthetic leg can control the knee angle owing to the actuator and microprocessor. However, the active type is not cost-effective and the stability may be lost due to the malfunction of sensors. In order to resolve these disadvantages of passive and active type, a semi-active prosthetic knee which can control the knee angle is proposed in this work. The proposed semi-active one requires a less input energy but provides active type performance. In order to achieve this goal, in this work, a semi-active prosthetic knee using magneto-rheological (MR) damper for AK amputees is designed. The MR damper can support the weight of body by using less energy than actuator of active prosthetic. It can control knee angle by inducing the magnetic field at the time of stance phase. This salient characteristic is evaluated and presented in this work.

소아마비 환자의 보행개선을 위한 새로운 장하지 보조기의 무릎관절 제어 (Knee Joint Control of New KAFO for Polio Patients Gait Improvement)

  • 강성재;조강희;김영호
    • 한국정밀공학회:학술대회논문집
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    • pp.132-135
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    • 2002
  • In the present study, an electro-mechanical KAFO (knee-ankle-foot orthosis) which satisfies both the stability in stance and the knee flexion in swing was developed and evacuated in eight polio patients. A knee joint control algorithm suitable for polio patients who are lack of the stability in pre-swing was also developed and various control systems and circuits were also designed. In addition, knee flexion angles and knee moments were measured and analyzed for polio patients who used the developed KAFO with the three-dimensional motion analysis system. Energy consumption was also evaluated for the developed KAFO by measuring the movement of the COG (center of gravity) during gait. From the present study, the designed foot switch system successfully determined the gait cycle of polio patients and controlled knee joint of the KAFO, resulting in the passive knee flexion or foot clearance during swing phase. From the three-dimensional gait analysis for polio patients, it was found that the controlled-knee gait with the developed electro-mechanical KAFO showed the knee flexion of 40$^{\circ}$∼45$^{\circ}$ at an appropriate time during swing. Vertical movements of COG in controlled-knee gait (gait with the developed electro-mechanical KAFO) were significantly smaller than those in looked knee gait(gait with the locked knee Joint). and correspondingly controlled-knee gait reduced approximately 40% less energy consumption during horizontal walking gait. More efficient gait patterns could be obtained when various rehabilitation training and therapeutic programs as well as the developed electro-mechanical KAFO were applied for polio patients.

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수지뜸요법이 노인의 슬관절통증, 관절가동범위 및 일상생활활동 불편감에 미치는 영향 (The Effect of Hand Moxibustion Therapy on Knee Joint Pain, Joint Range of Motion and Discomfort during ADL in Elderly People)

  • 우순녀;여현주;김경숙;박정숙
    • 기본간호학회지
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    • v.10 no.2
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    • pp.244-253
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    • 2003
  • Purpose: This study was done for the purpose of testing the effects of hand moxibustion on pain in the knee joint, range of motion of the knee, and discomfort during ADL in elderly persons with knee joint pain. Method: Nonequivalent control group pre-post test research design was used. The participants were 35 elders who had knee joint pain. Sixteen were assigned to the experimental group and 19 to the control group. The instruments used for this study were the CRS (Graphic rating scale) for knee joint pain, goniometer for knee joint ROM, and modified ADL questionnaire developed by Lee. Analysis of data was done by percents, means and standard deviation, $x^2$-test, t-test, and ANCOVA using SPSS WIN 10.0. Result: The pain score for the right knee joint after hand moxibustion was significantly different between the experimental group and the control group after hand moxibustion (p=.035). The pain score for the left knee joint was not significantly different between the experimental group and the control group after hand moxibustion (p=.075). Right and left knee ROM scores were significantly different between the experimental group and the control group after hand moxibustion (Right p=.000, Left p=.034). Discomfort of ADL score was not significantly different between the experimental group and the control group after hand moxibustion (p=.053). Conclusion: In summary, knee joint pain in elders after hand moxibustion decreased and knee ROM in elders after hand moxibustion increased. So it would be useful for nurses to provide hand moxibustion as an alternative therapy to elders with knee joint pain in the community and thus reduce joint pain and increase knee ROM.

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Electromyographic Analysis of Gluteus Maximus, Gluteus Medius, Hamstring and Erector Spinae Muscles Activity During the Bridge Exercise With Hip External Rotation in Different Knee Flexion Angles in Healthy Subjects

  • Lee, Kyung-eun;Baik, Seung-min;Yi, Chung-hwi;Kim, Seo-hyun
    • 한국전문물리치료학회지
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    • v.26 no.3
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    • pp.91-98
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    • 2019
  • Background: The bridge exercise targets the gluteus maximus (Gmax) and gluteus medius (Gmed). However, there is also a risk of dominant hamstring (HAM) and erector spinae (ES) muscles. Objects: To analyze the muscle activity the of Gmax, Gmed, HAM and ES during the bridge exercise with and without hip external rotation in different degrees of knee flexion. Methods: Twenty-three subjects were participated. The electormyography (EMG) activity of the Gmax, Gmed, HAM and ES muscles was recorded during the exercise. The subjects performed the bridge exercise under four different conditions: (a) with $90^{\circ}$ knee flexion, without hip external rotation (b) with $90^{\circ}$ knee flexion, with hip external rotation (c) with $135^{\circ}$ knee flexion, without hip external rotation (d) with $135^{\circ}$ knee flexion, with hip external rotation. Results: There was no significant interaction effect between the degree of knee flexion and hip external rotation. There was a significant main effect for degree of knee flexion in Gmax, HAM muscles activity. Gmax muscle activity was significantly greater in the $135^{\circ}$ knee flexion position than in the $90^{\circ}$ knee flexion position (p<.001). While HAM muscle activity was significantly less in $135^{\circ}$ knee flexion position than in the $90^{\circ}$ knee flexion position (p<.001). ES muscle activity was significantly less in the $135^{\circ}$ knee flexion position than in the $90^{\circ}$ knee flexion position (p=.002). The activity of both the Gmax and Gmed muscles was significantly greater with hip external rotation (p<.001 and p=.005, respectively). Conclusion: For patients performing the bridge exercise, positioning the knee in $135^{\circ}$ of flexion with hip external rotation is effective for improving Gmax and Gmed muscle activity while decreasing HAM, and ES muscle activity.