• PNF and Movement
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• 제15권1호
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• pp.97-104
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• 2017

Purpose: This study seeks to determine the effect of a lower extremity strengthening exercise that uses proprioceptive neuromuscular facilitation (PNF) on the gait and balance ability of a stroke patient. Methods: In this case study, a lower extremity strengthening exercise that used PNF was performed by the subject for 30 minutes 4 times per week for a 4-week period alongside typical rehabilitation therapy. The lower extremity pattern used flexion-abduction-internal rotation with knee flexion, extension-abduction-internal rotation, bilateral leg extension pattern. The 10 m walk test and 6 minute walk test were used to assess gait ability. The Berg balance scale was used to assess balance ability. Results: After the intervention, the time for the 10 m walk test decreased by 5.72 sec, the distance for the 6 minute walk test decreased by 20 meters, and the score on the Berg balance scale improved by 7 points, which indicates the effectiveness of this therapy for stroke patients. Conclusion: The results of this study indicate that a lower extremity strengthening exercise using PNF can improve the gait ability and balance ability of stroke patients.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2004년도 추계학술대회
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• pp.1564-1568
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• 2004

The requirements of internal balance were studied that should be considered on performing force & moment transonic wind tunnel testing to develop combat aircraft. In many insecure factors of test condition, uncertainty analysis was conducted to verify one drag count measurements. The analysis result was applied to T-50 aircraft model and compared for data verifaction. In conclusion, the aerodynamicist should estimate the validation and accuracy of test data by having an overall grasp of system components including internal balance. It will help him get high productivity of testing and effective validated data at tunnel.

• 한국운동역학회지
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• 제33권2호
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• pp.62-72
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• 2023

Objective: Although balance training has been used as an effective ankle injury rehabilitation program to restore neuromuscular deficits in patients with chronic ankle instability, it is not effectively used in terms of motor learning. Attentional focusing can be an effective method for improving ankle kinematics to prevent recurrent ankle injuries. This study aimed to 1) evaluate the effects of attentional focus, including internal and external focus, and 2) determine a more effective focusing method for patients with chronic ankle instability to learn balance tasks. Method: Twenty-four patients with chronic ankle instability were randomly assigned to three groups (external focus, internal focus, and no feedback) and underwent four weeks of progressive balance training. The three-dimensional ankle kinematics of each patient were measured before and after training as the main outcomes. Ensemble curve analysis, discrete point analysis, and post hoc pairwise comparisons were performed to identify interactions between groups and time. Results: The results showed that (1) the external focus group was more dorsiflexed and everted than the internal focus group; (2) the external focus group was more dorsiflexed than the no feedback group; and (3) the no feedback group was more dorsiflexed than the internal focus group. Conclusion: Because dorsiflexion and eversion are ankle motions that oppose the mechanism of lateral ankle sprain, using the external focus method during balance training may be more effective in modifying these motions, thereby reducing the risk of ankle sprain.

• 대한한방내과학회지
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• 제38권2호
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• pp.289-300
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• 2017

Objectives: This case report describes the effect of Hominis placenta pharmacopuncture (HPP) on multiple sclerosis. Methods: A multiple sclerosis patient with gait disturbances, tremors, spasms of both lower limbs, and diplopia was treated with only HPP for two weeks. To evaluate the effects of HPP on the balance ability of the patient, the Functional System (FS) scale, Expanded Disability Statue Scale (EDSS), visual analog scale (VAS), manual muscle test (MMT), and Berg Balance Scale (BBS) were used. Results: The HPP treatment reduced the patient's gait disturbance, tremors, spasms of the lower limbs, and diplopia. According to the FS scale, the patient's cerebellar and optic functions were enhanced. In addition, the patient's performance on the EDSS improved from 4.0 to 3.0.3. As shown by the MMT, the lower extremities showed a mild improvement (from F+ to G.4). Furthermore, the VAS showed a considerable improvement, decreasing from 9 to 6.5 post-treatment. The patient's performance on the BBS, which denotes balance ability, showed a considerable improvement, increasing from 38 to 49. Conclusion: Treatment with only HPP could help to ameliorate the symptoms of multiple sclerosis.

• 한국항공우주학회지
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• 제31권9호
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• pp.9-17
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• 2003

본 논문에서는 내장형 밸런스에 가해지는 모형중량성분의 보상을 위해 초기하중의 전이를 고려한 weight tare 계산방안을 제시하였다. 만약, 이러한 초기하중의 영향을 고려하지 않고 공력하중 데이터에 밸런스 교정관계식을 그대로 적용한다면 공력하중 전체에 걸쳐서 오차가 발생하게 된다. 본 계산방안의 신뢰성 검증을 위해 계산중량과 실측중량간의 비교 평가와 초기하중의 영향에 대한 평가를 수행하였다.

• 한국전문물리치료학회지
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• 제22권1호
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• pp.49-57
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• 2015

The purpose of this study was to investigate the dynamic balance and activity of internal oblique muscle, multifidus muscle, gluteus maximus muscle, biceps femoris muscle during the Y balance test following the wearing of pelvic compression belt. Forty healthy adults were recruited for this test. The dynamic balance score was estimated as the following: (anterior+posteromdial+posterolateral)/($3{\times}leg$ length)${\times}100$. The electromyography signals were measured through %reference voluntary contraction, which was normalized by reference voluntary contraction of Y balance test without wearing the pelvic compression belt. The paired t-test was carried out to compare the dynamic balance score and the activity of the trunk and hip extensor with and without the wearing of pelvic compression belt. The dynamic balance score of the Y balance test when wearing pelvic compression belt was significantly than when measured without wearing the pelvic compression belt (p<.05). The muscle activity of the internal oblique and the multifidus was significantly decreased when wearing pelvic compression belt (p<.05). The muscle activity of the gluteus maximus was significantly increased when wearing pelvic compression belt (p<.05). However, there was no significant difference in hamstring muscle activity, with or without wearing the belt (p>.05). In conclusion, this study shows that the wearing of pelvic compression belt affects trunk muscle and hip extensor muscle activity related to the pelvic mobility and stability and increases dynamic balance and also contributes to the stabilization of the external pelvic stabilization.

• 대한한방내과학회지
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• 제38권6호
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• pp.1049-1059
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• 2017

Objectives: The aim of this study was to evaluate the effect of Korean medicine on a patient with dizziness due to hippocampal sclerosis. Methods: A 51-year-old woman with dizziness, diagnosed with hippocampal sclerosis, was treated with herbal medication, acupuncture, and moxibustion. Her improvement was evaluated by a balance test, NRS, and the percentage of dizziness severity compared to that on her admission day. Results: Improvement in the balance test result and NRS, and a decrease of percentage of dizziness severity, were observed after treatment with Korean medicine. Conclusions: This study suggests that treatment with Korean medicine may be an effective therapy for dizziness due to hippocampal sclerosis.

• 한국지능시스템학회논문지
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• 제16권5호
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• pp.601-607
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• 2006

본 논문은 칼만필터를 이용한 ZMP의 다음 상태 예측을 통한 새로운 이족로봇의 균형제어기법을 제안한다. 일반적으로 이족로봇의 동역학 모델은 3D-LIPM(3D-Linear Inverted Pendulum Mode)에 의해 수학적으로 근사화되지만, 이는 로봇의 동역학적 특성을 완벽하게 표현할 수 없다. 이족로봇의 안정성은 ZMP(Zero Moment Point) 위치가 안정영역에 존재하는 경우에 안정성이 보장된다. 그리고 로봇 구조와 그 모델 사이의 내재된 오차는 로봇의 안정성에 영향을 끼칠 수 있다. 그러므로 본 논문에서 제안하는 균형제어기법은 내부 오차를 줄일 수 있으며, 적절한 로봇의 제어가 가능하다. 제안된 균형제어기법의 실험은 다양한 상황을 포함한 가상의 공간상에서 모의실험 되었다.

• 대한기계학회논문집
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• 제16권2호
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• pp.191-199
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• 1992

This paper presents in experimental study of the dynamic internal pressure within an oil hydraulic vane pump. The measurements of the dynamic internal pressures near the vane of a pressure balance type of an oil hydraulic vane pump with intravanes has been made to provide the essential information for the study of the pump dynamics and control, the pump design and the analysis of tribological problems in the sliding components. The influences of the discharge pressure and rotating speed of the vane on the dynamic pressure in four chambers surrounding a vane have been investigated. The results indicate that the surge pressures of the chambers at the instant moment of discharge and closure are affected by the rotating speed. The pressure in the intravane chamber maintains almost constant values, which remarkably effects the pulsating discharge pressure.

• 대한한방내과학회지
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• 제35권3호
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• pp.373-382
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• 2014

Objectives: This study is a report of the clinical application of traditional Korean medicine on ataxia with cerebellar atrophy. Methods: The ataxia in this case occurred 5 years ago. The symptoms had been getting worse until the patient came to hospital. The MRI of this patient showed atrophy of the cerebellum. We measured the state of this case with the Korean version of the Berg Balance Scale (K-BBS), before and after treatment and Numeric Rating Scale-11 (NRS-11) of the symptoms, every week. We treated the case with traditional Korean medicine such as acupuncture and Gamiyukmijihwang-tang. Results: After treatment, the score of K-BBS increased, while the score of NRS-11 decreased. Conclusions: According to this study, traditional Korean medicine is effective for controlling ataxia caused by cerebellar atrophy.