• Journal of Korean Physical Therapy Science
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• v.19 no.3
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• pp.49-56
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• 2012

Background : The purpose of this study is to understand the effects of ankle joint taping on balancing abilities of the elderly and to provide preliminary data on preventing falls among the elderly. Methods : In this study, 20 students(8 male, 12 female) in their 20s from D University as well as 14 elderly(4 male, 10 female) in their 70s from S community center have participated. The participants were well informed about the experiment and voluntarily participated. We measured the difference in balancing ability before and after taping between the two groups using methods such as standing on single-leg stance, TUG, and plantar pressure. Kinesio taping, a stop-watch, and the EMED-system were used as equipment along with the SPSS 12.0 program, with a significance level of 0.05, to test the difference before and after taping between the two groups. Result : First, the 70s group showed a significant increase in the dorsal flexion angle after taping. Second, the 70s group showed a significant increase in duration time of standing on one foot after taping. Third, the 70s group's TUG time was significantly shorter. Fourth, the maximum peak value for static and dynamic plantar pressure showed a significant decrease after taping; and dynamic plantar pressure area value decreased as well within significant range. Conclusion : The study has shown that taping is effective on static dynamic balancing ability of the elderly.

• Korean Journal of Applied Biomechanics
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• v.19 no.1
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• pp.149-157
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• 2009

The purpose of this project was to determine biomechanical differences between Type A(Korean brand) and Type B(world top brand) badminton shoes and to make recommendations to improve the fit and function of Type A badminton shoes. Measurements of shoe shape and dimensions, foot movement within the shoe, cushioning of ground reaction forces, in-shoe pressure and outsole traction were performed. In addition, subjective feedback of the fit and function of the shoes was quantified for 17 recreational badminton players. Type A shoe had a much higher heel and shallower heel cup, so the heel was not secured well in the shoe and the ankle joint was higher off the ground. Foot slippage was up to 40% greater in Type A shoe than Type B shoe. Impact forces and peak pressures under the foot were generally higher with Type A shoe compared to Type B shoe. The flexion axis of Type A shoe occurred in the midfoot, not at the ball of the foot like Type B shoe, where you would want the shoe flexion to occur. In summary, there are several characteristics where A Type shoe and B Type differ. Therefore, a few recommendations are provided to help improve the fit and function of A Type shoe.

• Advances in Traditional Medicine
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• v.7 no.5
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• pp.501-508
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• 2008

Anti-nociceptive and anti-inflammatory effects of Clematidis Radix (CR)-distillates were investigated in three different pain animal models. Highly purified distillate of CR was injected to Zusanli (ST36) acupoint, called CR herb-acupuncture in the Korean traditional medicine. In tail flick latency test, the CR herb-acupuncture treatment did not show a significant effect of relieving acute phasic pain. To investigate the anti-inflammatory effect of CR herb-acupuncture, inflammatory pain was induced by subcutaneous injection of formalin to the plantar tissue or intra-articular injection of carrageenan to the tibio-tarsal joint in the rats. And the medicinal effect of CR herb-acupuncture was evaluated by analyzing pain behavior such as licking or biting behavior, or by measuring weight distribution ratio between two foot and ankle circumference. In the rat formalin test, the analgesic effect of CR herb-acupuncture was more pronounced in the late phase (for 20 min after the early phase) than in the early phase (for the first 10 min post formalin injection). It also significantly alleviated the carrageenan-induced monoarthritis, in terms of weight distribution ratio and ankle edema. These results revealed that CR herb-acupuncture was effective to treat the inflammatory pain and could be used as an analgesic treatment with an antiinflammatory effect.

• Journal of Korean Foot and Ankle Society
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• v.1 no.2
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• pp.102-111
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• 1997

The tibial Pilon fracture, which is defined as a comminuted intraarticular fracture of the distal tibia, is difficult to manage because high axial compression and rotational forces to the ankle joint result in impaction, severe comminution, metaphyseal disruption and soft tissue damage. There are variable methods of treatment such as manipulation and cast, calcaneal traction and cast, external fixation, pin and plaster, limited open reduction and external fixation, and open reduction and rigid internal fixation. Though most of authors reported better result after a surgical treatment. than that of conservative treatment, many complications such as posttraumatic arthritis and soft tissue problem still remain troublesome. We have reviewed 19 cases of the tibial Pilon fractures in 18 patients which were treated with limited open reduction and internal fixation from September 1993 to May 1996. The results were as follows: 1. The fractures were classified into five types according to the system of Ovadia and Beals, and the most frequent type was type 3 (53%). The most common cause of injury was traffic accident (47%). 2. All of the cases of type 1 and 2, in which the injury of the ankle joint was less severe, revealed good or excellent clinical results. But in type 4 and 5, because the injury is much severe and accurate reduction is difficult, the clinical results were unsatisfaetory. 3. The most frequent complication was posttraumatic osteoarthritis, and which developed in second frequent complication, was developed m the three cases of type 3 in which the radiographic results were less than fair, but there were no correlation with the clinical results. 4. We could markedly reduce the complications related to the soft tissue problem of Pilon fracture by treatment with limited open reduction and internal fixation, and consider that this is a good method of treatment of Pilon fracture when the injury is less severe and accurate reduction is possible.

• The Journal of Korea Robotics Society
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• v.18 no.3
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• pp.241-250
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• 2023

This paper describes the posture stabilization control of a bipedal transformer robot being developed for military use. An inverted pendulum model with a rectangular that considers the robot's inertia is proposed, and a posture stabilization moment that can maintain the body tilt angle is derived by applying disturbance observer and state feedback control. In addition, vertical force and posture stabilization moments that can maintain the body height and balance are derived through QP optimization to obtain the necessary torques and vertical force for each foot. The roll and pitch angles of the IMU sensor attached to the robot's feet are reflected in the ankle joint to enable flexible adaptation to changes in ground inclination. Finally, the effectiveness of the proposed algorithm in posture stabilization is verified by comparing and analyzing the difference in body tilt angle due to disturbances and ground inclination changes with and without algorithm application, using Gazebo dynamic simulation and a down-scale test platform.

• 한국체육학회지인문사회과학편
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• v.57 no.3
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• pp.345-356
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• 2018

Objective: The purpose of this study was to investigate the local stability of the lower extremity joints and muscle activation patterns of the lower extremity during walking between falling and non-falling group in the elderly women. Method: Forty women, heel strikers, were recruited for this study. Twenty subjects (age:72.55±5.42yrs; height:154.40±4.26cm; mass:57.40±6.21kg; preference walking speed:0.52±0.17m/s; fall frequency=1.70±1.26 times) had a history falls(fall group) within two years and Twenty subjects (71.90±2..90yrs; height:155.28±4.73cm; mass:56.70±5.241kg; preference walking speed: 0.56±0.13m/s) had no history falls(non-fall group). While they were walking on a instrumented treadmill at their preference speed for a long while, kinematic and EMG signals were obtained using 3-D motion capture and wireless EMG electrodes, respectively. Local stability of the ankle and knee joint were calculated using Lyapunov Exponent (LyE) and muscles activation and their co-contraction index were also quantified. Hypotheses were tested using one-way ANOVA and Mann-Whitey. Spearman rank was also used to determine the correlation coefficients between variables. Level of significance was set at p<.05. Results: Local stability in the knee joint adduction-abduction was significantly greater in fall group than non-fall group(p<.05). Activation of anterior tibials that acts on the foot segment dorsal flexion was greater in non-fall group than fall group(p<.05). CI between gastrocnemius and anterior tibials was found to be significantly different between two groups(p<.05). In addition, there was significant correlation between CI of the leg and LyE of the ankle joint flexion-extention in the fall group(p<.05). Conclusion: In conclusion, muscles that act on the knee joint abduction-adduction as well as gastrocnemius and anterior tibials that act on the ankle joint flexion-extention need to be strengthened to prevent from potential fall during walking.

• Journal of Korean Foot and Ankle Society
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• v.10 no.2
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• pp.117-124
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• 2006

Purpose: This study was aimed at elucidating the pathogenesis of talar osteochondral lesion by analyzing the histopathological findings. Materials and Methods: Twenty specimens from 20 patients who underwent surgical treatment for talus osteochondral lesions were studied. Preoperative MRI images including T1, T2, and stir images were taken and cases were classified according to modification of the Anderson's classification. There were 5 cases of MRI group 1, 6 cases of group 2, 7 cases of group 3 and 2 cases of group 4. A full thickness osteochondral plug including the osteochondral lesion of the talus was harvested from each patient and reviewed histopathologic changes of osteochondral fragment using H-E staining. Mean diameter of specimens was 8.5 mm and mean depth was 10.3 mm. Pathologic changes of articular cartilage and subchondral bone were observed. Subchondral bone was divided into superficial, middle and deep zones according to depth. Cartilage formation, trabecular thickening and marrow fibrosis were observed in each zone. Results: There were detachment of the joint cartilage at the tidemark in 16 cases of 20 cases and the separated cartilages were almost necrotic on the histopathologic findings. Cartilage formation within subchondral bone was discovered beneath the tidemark in 12 cases. Trabeculae were increased and thickened in 17 cases. These pathologic changes were similar to fracture healing process and these findings were more conspicuous near the tidemark and showed transition to normal bone marrow tissue with depth. No correlation between the pathological progression and MRI stages was found. A large cyst shown on MRI's was microscopically turned out to be multiple micro-cysts accompanied by fibrovascular structure and newly formed cartilage tissue. Conclusion: The histopathologic findings of osteochondral lesions are detachment of overlying cartilage at the tidemark and subsequent changes of subchondral bone. Subchondral bone changes are summarized as cartilage formation, marrow fibrosis and trabecular thickening that mean healing process following repeated micro fractures of trabecular. These osteochondral lesions should have differed from osteochondral fractures.

• Journal of Acupuncture Research
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• v.22 no.4
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• pp.1-12
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• 2005

Objectives : The Purpose of this study is to report in patient with common peroneal nerve palsy, who improved by oriental medical treatament. Methods : We Checked the temperature of a leg by Digital Infrared Thermal Imaging(DITI) at intervals of 10 days, angle of active dorsiflexion and range of active motion for estimating the improvement of symptoms. We used the Visual Analogue Scale(VAS) for estimating the degree of pain, too. Results : After 4 weeks treatment, the movement and power of ankle joint improved to nearly normal range. The degree of active dorsiflexion of the ankle increased from $-40^{\circ}\;to\;15^{\circ}$ and range of active motion increased from Gr III to Gr I. The difference of temperature between the both legs decreased remarkably. Conclusion : In this case we experienced improvement of symptoms by conservative oriental medical therapy, e.g acupuncture stimulation, herbal medication, physical therapy. It should be needed further investigation on common peroneal nerve palsy and its symptoms in order to set up a reasonable standard about a surgical operation.

• Journal of Korean Foot and Ankle Society
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• v.16 no.4
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• pp.229-234
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• 2012

Purpose: The purpose of this study is to find out clinical and radiological outcomes in 70 patients of both calcaneal fracture. Materials and Methods: From March 1993 to March 2011, 70 patients underwent non-operative management or operative management at our hospital. Conservative management was performed in 15 cases of undisplaced fracture (Group A). Operative management was performed in 125 cases including 32 cases of undisplaced fracture (Group B), 60 cases of joint depression type fracture (Group C), 33 cases of tongue type fracture (Group D). Results were evaluated by VAS score, AOFAS score, circle draw test, Bohler angle (BA), Gissane angle, width & height of calcaneus. Results: VAS scores were 2.0 in group A, 2.0 in group B, 2.2 in group C, 2.7 in group D. AOFAS scores were 90.4 in group A, 91.9 in group B, 72.2 in group C, 79.2 in group D. Circle draw tests were 8.4 cm in group A, 10.1 cm in group B, 7.6 cm in group C, 7.9 cm in group D. Bohler angles (BA) and Gissane angles were $19.1^{\circ}$, $96.7^{\circ}$ in group A, $21.8^{\circ}$, $119.1^{\circ}$ in group B, $26.3^{\circ}$, $121.2^{\circ}$ in group C, $19.7^{\circ}$, $119.7^{\circ}$ in group D. Calcaneal widths and heights were 39.5 mm, 31.6 mm in group A, 32.7 mm, 37.0 mm in group B, 34.4 mm, 39.2 mm in group C, 35.2 mm, 38.7 mm in group D. Conclusion: The main cause of bilateral calcaneal fracture is an injury from a fall, and the cases were more frequently occurred in men than women. Also the fracture in the right side tend to occur more severely compared to the left side. The surgical treatment shows better results than conservative treatment in bilateral calcaneal fracture.

• The Journal of the Korea Contents Association
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• v.9 no.12
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• pp.364-375
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• 2009

The purpose of this study is to offer basic data for the fall prevention by analyzing the kinematic difference between the lower limb joints and the lower extremities in elderly people's walking given the lower-limb resistance exercises. For this, three-dimensional image analysis was carried out by selecting 7 elderly women from over 70s to under 80 years old. To obtain the three-dimensional location coordinates in the lower limb joints and the lower extremities, it shot with 100Hz/s by using MCU(Qualisys, Sweden) camera. The shot image gained raw data on the location coordinates by using QTM(Qualisys, Sweden). As a result of calculating three-dimensional angle by using program of Matlab 6.5, the following conclusions were obtained. Flexion and extension in the thigh and the lower-leg extremities were indicated to be big in motion of flexion after exercising at E5. Foot segment indicated statistical difference while showing eversion at E4. Knee joints showed flexion at E4 after exercising. Ankle joints showed statistical difference while indicating motion in inversion at E3 and in eversion at E4(p<.05).