• 제어로봇시스템학회논문지
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• 제15권6호
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• pp.626-633
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• 2009

A motion planning algorithm is presented in this paper for a commercialized quadruped walking of robot pet. Stable walking is the basic requirement for a commercial-purpose legged robot. In order to secure the walking stability, modified body sway to the centroid of support polygon is addressed. By representation of walking motion with respect to the world coordinate system rather than body coordinate, it is possible to design the several gaits in unified fashion. The initial gait posture is introduced to maximize the stride and to achieve fast walking. The proposed walking motion planning is verified through computer simulation and experiments.

• 한국전문물리치료학회지
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• 제13권3호
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• pp.41-48
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• 2006

This study investigated therapeutic effects of pelvic tilt exercise (PTE) on weight bearing and body sway during sit-to-stand (STS) on 18 hemiplegic patients who had visited the Hanyang University Seoul Hospital and Injae University Sanggyebek Hospital physiotherapy rooms. The study compared the patients with 18 normal adults. The subjects were sampled out from those who could get up independently, maintain a standing posture more than 10 seconds, understand the movements of this study and have no difficulty in performing the tasks. By executing STS in a natural way with habitual movements before and after PTE, the weight bearing was measured by using Mediance II. In order to compare the difference of weight distribution, weight bearing and body sway on affected and nonaffected sides during STS before and after PTE, the Wilcoxon Signed Ranks Test was used. The statistical significance level was based on p<.05. The results revealed that the difference of weight distribution in the hemiplegic group was significantly decreased (p<.05), whereas there was no significant difference in the healthy group (p>.05). Weight bearing loaded on the affected side was $42.53{\pm}7.65%$ and $44.20{\pm}6.32%$, respectively, in the hemiplegic group during STS before and after PTE. Weight bearing during STS after PTE is increased significantly, as compared with weight bearing before PTE (p<.05). Body sway in the hemiplegic group was significantly decreased (p<.05). As mentioned, PTE proved to be effective for improvement in weight bearing on the affected side during STS of hemiplegic patients.

• 한국전문물리치료학회지
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• 제22권1호
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• pp.1-8
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• 2015

The purpose of this study was to compare the change in electromyography (EMG) activity in the gluteus maximus (G-max) and the gluteus medius (G-med) in subjects with and without chronic ankle instability (CAI) during three functional postures. Twenty four females were recruited for this study. Subjects were assigned into two groups: with CAI ($n_1=12$) and without CAI ($n_2=12$). The assessment postures were rotational squat, one leg stand above a gradient and crossed leg-sway. Electromyographic activities of the G-max and the G-med were recorded using surface EMG and was normalized using the maximal voluntary isometric contraction elicited using a manual muscle testing. Independent t-test was used to determine the statistical differences between two groups during the three functional postures. The comparisons of the three posture between two groups were performed using a one-way repeated analysis of variance. A Bonferroni adjustment used for post hoc analysis. The activation of EMG on G-max performing the one leg stand above a gradient and crossed leg-sway in subjects with CAI is significantly higher than normal group (p<.05). The activation of EMG on the G-max during the rotational squat was significantly increased, compared to those of the one leg stand above a gradient and crossed leg-sway (p<.05). The activation of EMG on G-med performing three exercise at CAI is significantly higher than normal group (p<.05). The activation of EMG on the G-med during the crossed leg-sway was significantly increased, compared to the rotational squat (p<.05). This study provides valuable information for clinician who research CAI.

• International journal of advanced smart convergence
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• 제4권1호
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• pp.99-103
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• 2015

Quake wavelength technique was designed of the sway by the body. There was presented a concept of the dangle wavelength by twisting condition of posture. We compared to the twisting condition for an average variation and maximum variation with the movement. There was used a combination system and correlation system of the posture. Their correlation signal was presented a control data by the dynamic movement. The quake wavelength system was to be formation of activity aspects by posture. The correlation of wavelength technique was applied to the a little action of posture variation signal. Quake wavelength by the dynamic movement was determined to a variation of vision condition of the $Vi-{\alpha}_{AVG}$ with $(-1.27){\pm}(-0.34)$ units, that vestibular condition of the $Ve-{\alpha}_{AVG}$ with $(-0.49){\pm}(-0.4)$ units, that somatosensory condition of the $So-{\alpha}_{AVG}$ with $0.037{\pm}0.269$ units, that CNS condition of the $C-{\alpha}_{AVG}$ with $(-0.049){\pm}0.015$ units. As the study of the quake wavelength technique was depended on the action system of body movement that a maximum and averag values was used a movement of combination data. The system was required an action signal for the form of actual signal on the basis of a little movement condition in the body. The human action systemwas compared to maximum and average from the movement derived the body. Therefore, their system was controlled to evaluate posture condition for the body correlation.

• The Journal of Korean Physical Therapy
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• 제25권5호
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• pp.232-238
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• 2013

Purpose: The aim of this study was to evaluate the effect of lumbar stabilization exercise on an unstable surface on trunk posture and static standing balance ability in patients with scoliosis. Methods: Subjects included 18 patients who showed symptom of scoliosis. Patients were divided into two experimental groups, one using an unstable surface and one using a fixed surface, and the patients were required to perform a lumbar stabilization exercise a total of 12 times for 60 minutes per session, three times per week for a period of four weeks, with a six-months follow-up period. Results: A significant reduction was observed in the group that performed the lumbar stabilization exercise on an unstable surface (p<0.05). A significant decrease in both the condition of closed eyes or open eyes in the left and right directions was observed in the group that performed the lumbar stabilization exercise on an unstable surface (p<0.05). After six months, results of comparison of the length of both sides of the trunk showed a significantl decrease in the group performing lumbar stabilization exercises on an unstable surface. Conclusion: Lumbar stabilization exercise on an unstable surface improved the trunk posture of patients with scoliosis symmetrically, and static balance ability in a standing posture showed improvement. In the future, lumbar stabilization exercise on an unstable surface may be used as an exercise for posture correction and balance increase for patients with scoliosis.

• 한국의류학회지
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• 제27권5호
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• pp.463-474
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• 2003

In this research, adult women＇s shoulder types were Classified through direct and indirect measurements to present a judging individual body size according to the type. Also, regression formula by shoulder types were calculated and presented the basic bodice pattern. The results were as follows: 1. The result of factor analysis indicated that 6 factors were extracted through factor analysis and those factors comprised 66.1 to of total variance. 2. By using factor scores, cluster analysis was carried out and subject were classified into 5 clusters. Type 1 was the inclined shoulders, wide shoulders and passive posture. Type 2 was the front type shoulders and active posture. Type 3 was the thick shoulders and back type shoulders. Type 4 was the narrow shoulders. Type f was the drooped shoulders, thin shoulder and sway posture. 3. The body types of individuals were judged by discriminant analysis. 4. After setting 4 items such as the bust girth, posterior waist length, neck base girth and waist girth as representative items and regression formulas were presented. the superiority of the final basic bodice patterns were demonstrated by high approval rate of the subjects who participated in testing.

• Physical Therapy Rehabilitation Science
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• 제11권1호
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• pp.97-104
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• 2022

Objective: Flexed posture commonly increases with age in older adults and is characterized by kyphosis and forward head posture. Changes in the posture with age affect both balance and mobility. This study was conducted to examine the effects of a cervical stabilization exercise for community-dwelling older adults to improve balance. Design: Two groups pretest-posttest design. Methods: Fifty older adults were randomly assigned into the cervical stabilization exercise group (n=24) and control group (n=25). The cervical stabilization exercise group (n=24) participated in group exercise for 60 minutes twice a week over 4 weeks. Timed up and go test (TUG), four square step test (FSST), functional reach test (FRT), postural sway, cervical range of motion (CROM), proprioception, craniovertebral angle (CVA) were evaluated before and after the intervention. Results: TUG, FSST, FRT, CROM, Proprioception, CVA showed significantly greater improvement, compared with a control group (p<0.05). Conclusions: Findings of this study demonstrate that cervical stabilization exercise can help improve not only neck functional capacities but also balance. Therefore, it may be used as an effective balance exercise program for community-dwelling older adults.

• The Korean Journal of Pain
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• 제37권2호
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• pp.164-177
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• 2024

Background: Neck and jaw pain is common and is associated with jaw functional limitations, postural stability, muscular endurance, and proprioception. This study aimed to investigate the effect of jaw and neck pain on cranio-cervico-mandibular functions and postural stability in patients with temporomandibular joint disorders (TMJDs). Methods: Fifty-two patients with TMJDs were included and assessed using Fonseca's Questionnaire and the Helkimo Clinical Dysfunction Index. An isometric strength test was performed for the TMJ depressor and cervical muscles. The TMJ position sense (TMJPS) test and cervical joint position error test (CJPET) were employed for proprioception. Total sway degree was obtained for the assessment of postural stability. Deep neck flexor endurance (DNFE) was assessed using the craniocervical flexion test. The mandibular function impairment questionnaire (MFIQ) was employed to assess mandibular function, and the craniovertebral angle (CVA) was measured for forward head posture. Results: Jaw and neck pain negatively affected CVA (R² = 0.130), TMJPS (R² = 0.286), DNFE (R² = 0.355), TMJ depressor (R² = 0.145), cervical flexor (R² = 0.144), and extensor (R² = 0.148) muscle strength. Jaw and neck pain also positively affected CJPET for flexion (R² = 0.116) and extension (R² = 0.146), as well as total sway degree (R² = 0.128) and MFIQ (R² = 0.230). Conclusions: Patients with painful TMJDs, could have impaired muscle strength and proprioception of the TMJ and cervical region. The jaw and neck pain could also affect postural stability, and the endurance of deep neck flexors as well as mandibular functions in TMJDs.

• 한국운동역학회지
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• 제18권1호
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• pp.245-253
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• 2008

본 연구의 목적은 유선형 신발바닥면을 가진 신발의 착용이 자세의 변화 및 조절전략에 미치는 영향을 살펴보는 것이다. 먼저 30명의 여대생을 대상으로 신발의 족저면과 접지면의 상대각도가 조절된 상태에서 'New York State Posture Test'로 평가하여 최적의 각도의 신발(s)을 제작한 후 여대생 10명씩 3개 집단에 대해 각각 제작된 신발(s)과 유선형 신발(m), 일반신발(n)의 8주착용 전 후의 전경골근, 비복근의 근활성도를 평가하였다. 1. 'New York State Posture Test'에서의 자세평가점수는 신발의 각도변화에 따라 $-2^{\circ}$, $-7^{\circ}$에서 쌍봉형을 이루었으며 통계적으로 유의하였다. 또한 $-7^{\circ}$에서 가장 좋은 평가점수가 나왔으므로 이 각도로 신발을 제작하였다. 2. 유선형의 아웃솔을 가진 s, m 신발의 활성패턴을 보면 맨발에서 s신발 착용자의 경우 비복근, m신발 착용자는 전경골근의 활성도가 증가하였으며, 신발을 착용한 상태에서는 s신발에서만 비복근의 활성도가 높게 나타났다.

• 재활복지공학회논문지
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• 제5권1호
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• pp.47-52
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• 2011

기능성 발보조기는 신발 착용 시 발바닥과 직접 접촉되어 비정상적인 신체 분절의 교정 및 발의 기능을 향상시킬 뿐만 아니라 체중 및 균형을 유지시키고 약화된 부위를 지지함으로써 사람의 직립자세 유지를 위한 균형 유지에 많은 도움이 된다. 이에 본 사례 연구에서는 보행 안정성을 비롯한 충격 흡수 기능을 수용할 수 있는 기능성 발보조기가 족부 형태 및 재질에 따라 신체의 균형유지에 미치는 영향에 대하여 연구하였다. 사람의 평균 무게 중심점의 흔들림 속도(sway velocity)를 이용한 균형감각 자세유지도의 고찰을 통해 족부형태별, 기능성 보조기의 재질에 따른 신체의 균형능력에 미치는 영향을 비교 평가한 결과, 안정한 상태에서 눈을 뜬 자세에서만 유의(p<0.006)한 결과를 나타냈으며, 이 자세에서 발의 형태별로 구분하여 통계 처리한 결과, 정상족(p<0.010), 편평족(p<0.000), 요족(p<0.003)의 순으로 나타났다. 그리고 기능성 발보조기의 재질에 따른 발의 형태별 균형에 미치는 영향을 분석한 결과, 연성재질은 정상의 발에서 그리고 경성재질은 편평족과 요족에 있어서 균형유지에 효과가 있는 것으로 나타났다.