• 제목/요약/키워드: 보행 역학

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자폐성 장애 아동의 시공간 및 압력분포 변인을 통한 장애물보행 분석 (Analysis of Obstacle Gait Using Spatio-Temporal and Foot Pressure Variables in Children with Autism)

  • 김미영;최범권;임비오
    • 한국운동역학회지
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    • 제21권4호
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    • pp.459-466
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    • 2011
  • The purpose of this study was to analyze of obstacle gait using spatio-temporal and foot pressure variables in children with autism. Fifteen children with autism and fifteen age-matched controls participated in the study. Spatio-temporal and foot pressure variables was investigated using GAITRite pressure sensor system. Each footprint was divided into 12 equal trapezoids and after that the hindfoot, midfoot and forefoot analysis was developed. Independent t-test was applied to compare the gait variables between the groups. The results showed that the autism group were significantly decreased in velocity, cadence, cycle and swing time compared to the control group. The autism group were significantly increased in step width and toe out angle compared to the control group. The autism group were significantly increased at midfoot and forefoot of lateral part of footprint and forefoot of medial part of footprint in the peak time compared to the control group. The autism group were significantly increased at midfoot and hindfoot in $P^*t$, at midfoot in active area, and at hindfoot in peak pressure compared to the control group. In conclusion, the children with autism showed abnormal obstacle gait characteristics due to muscle hypotonia, muscle rigidity, akinesia, bradykinesia and postural control impairments.

이십대 청년의 정상 및 비정상 계단보행특성에 따른 하지의 운동역학적 분석 (A Kinetic Analysis of the Lower Extremity on the Normal and Abnormal Specificity of Walking on Stair for Twenties)

  • 김영지;이영신;김창원
    • 한국CDE학회논문집
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    • 제16권6호
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    • pp.391-396
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    • 2011
  • Gait is walking attitude and indicating state. The body's gait is a good mix in the center of body mechanics and exercises to wake up gently at the same time switch is a pass which is complicated at legs various joints. The shifting action what swing phase and stance phase rhythmic movement of body. One from piece moves with different dot. Especially plain walking and stair walking as a vehicle has been used frequently. Characteristics of the stair walking while the balanced the horizontal and vertical movement. Stair walking often takes place in everyday. It requires large range more than walking at plain in the moment and joint range of gait motion. And consistently applied to joints and various types of loads at legs joint may involve joint disorders. In this study, spastic cerebral palsy existing artificial limbs for disabled people when developing calibration equinus deformity patients induce muscle pain when walking on stairs independently, to reduce the research. Comparing the characteristics of the walking up the stairs for analysis patellofemoral joint pain as a result it is to provide engineering data.

관성센서 기반 신발형 보행 분석기의 신뢰성 연구 (Reliability of 3D-Inertia Measurement Unit Based Shoes in Gait Analysis)

  • 주지용;김영관;박재영
    • 한국운동역학회지
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    • 제25권1호
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    • pp.123-130
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    • 2015
  • Purpose : The purpose of this study was to investigate the reliability of 3D-inertia measurement unit (IMU) based shoes in gait analysis. This was done with respect to the results of the optical motion capturing system and to collect reference gait data of healthy subjects with this device. Methods : The Smart Balance$^{(R)}$ system of 3D-IMU based shoes and Osprey$^{(R)}$ motion capturing cameras were used to collect motion data simultaneously. Forty four healthy subjects consisting of individuals in 20s (N=20), 40s (N=13), and 60s (N=11) participated in this study voluntarily. They performed natural walking on a treadmill for one minute at 4 different target speeds (3, 4, 5, 6 km/h), respectively. Results : Cadence (ICC=.998), step length (ICC=.970), stance phase (ICC=.845), and double-support phase (ICC=.684) from 3D-IMU based shoes were in agreement with results of optical motion system. Gait data of healthy subjects according to different treadmill speeds and ages were matched to previous literature showing increased cadence and reduced step length for elderly subjects. Conclusion : Conclusively, 3D-IMU based shoes in gait analysis were a satisfactory alternative option in measuring linear gait parameters.

노인 여성 관절염 환자의 보행시간에 따른 지면반력의 특징 (In According to Walking Time The Character of the Ground Reaction Force in Elderly OA(Osteo-Arthritis) Female Patient)

  • 이정호;서정석;은선덕
    • 한국운동역학회지
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    • 제17권2호
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    • pp.75-82
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    • 2007
  • The purpose of this study was to analyze and compare the effect of gait time on the gait patterns in elderly female OA and non-OA patients. The intensity of the subjects joint pain was surveyed by using WOMAC. Twelve subjects participated in this study. Measurements were taken for every the 10 minutes for 30 minutes after walking by a force plate. The following variables were recorded; double stance support time, Fx, Fy, Fx_time, Fz and so on. From the investigation of these variables the following was observed and concluded. The Fz values for the OA group was 1.01BW at the start and after 30 minutes was 1.04BW on the other hand the non-OA group's Fz1 was 1.08BW and 1.10BW. There was no significant difference calculated between the two groups and at the start and end of the experiment about all the variables. Therefore, it is concluded that there was no negative effect caused by walking for the 30 minutes and that it was an effective way of strengthen both respiratory and muscle function.

파킨슨 환자의 멈춤 보행 시 하지 근전도 분석 (Analysis of Lower Extremity Muscle Activities in Parkinson's Patients for Improving to Stop Task)

  • 양창수;임비오
    • 한국운동역학회지
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    • 제22권3호
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    • pp.333-339
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    • 2012
  • Freezing of gait is a severely problem in people with Parkinson's disease. The purpose of this study was to investigate the muscle activities of adductor longus, gluteus medius, gluteus maximus, biceps femoris, rectus femoris, gastrocnemius, and tibialis anterior using Noraxon 8 channels EMG system during stop task in patients with Parkinson's disease. Seven parkinson's patients and age matched normal participants were recruited in the study. Filtered EMG signals were rectified, smoothed and integrated. To control for the altered timing and magnitude of activity, iEMG was normalized for time and peak value. The results indicated that the patients with Parkinson showed decreased gait cycle, stance phase, swing phase time, swing phase time ratio and increased stance phase time ratio than normal participants. The patients with Parkinson showed decreased gastrocnemius muscle activity time ratio, while increased tibialis anterior muscle activity time ratio than normal participants. During stance phase before stop, the patients with Parkinson showed relatively lower average and peak iEMG in anterior tibialis and gastrocnemius muscle than normal participants. During swing phase before stop, the patients with Parkinson showed relatively higher average iEMG in gastrocnemius muscle than normal participants. During stop phase, the patients with Parkinson showed relatively lower average and peak iEMG in anterior tibialis and gastrocnemius muscle than normal participants.

보행 시 지지면 급변에 따른 연령별 운동학적 반응 형태 비교 (Comparison of Gait Pattern during the Support Phase after Perturbation According to Age)

  • 천영진;신인식
    • 한국운동역학회지
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    • 제21권3호
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    • pp.281-288
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    • 2011
  • The purpose of this study was to analyze the difference in reaction patterns during the support phase after perturbation in gait according to different age. A total of 12 subjects participated; 5 elderly and 7 adults(control), to investigate the differences between normal and perturbed gait. The step length didn't change during normal and perturbed gait but was longer in the control group. There was no difference in the step width. When the right foot was perturbed, the control group's left foot speed was faster than the elderly group's which was to maintain stability. The elderly flexed both right and left knees more than the control group. After the perturbation, the elderly group had a larger trunk anterior flexion. With the larger flexion of both legs of the elderly group it shows that the lack of knee flexion strength is a factor, that could cause falling and so a prevention program should focus on strengthening the quadriceps. With the excessive trunk flexion after the perturbation by the elderly group observed, it is suggested that while walking everyday a good routine of walking with an upright posture should be developed.

보행보조로봇을 위한 다중 생체/역학 센서의 신호 분석 및 사용자 의도 감지 (Detection of Implicit Walking Intention for Walking-assistant Robot Based on Analysis of Bio/Kinesthetic Sensor Signals)

  • 장은혜;전병태;지수영;이재연;조영조
    • 로봇학회논문지
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    • 제5권4호
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    • pp.294-301
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    • 2010
  • In order to produce a convenient robot for the aged and the lower limb disabled, it is needed for the research detecting implicit walking intention and controlling robot by a user's intention. In this study, we developed sensor module system to control the walking- assist robot using FSR sensor and tilt sensor, and analyzed the signals being acquired from two sensors. The sensor module system consisted of the assist device control unit, communication unit by wire/wireless, information collection unit, information operation unit, and information processing PC which handles integrated processing of assist device control. The FSR sensors attached user's the palm and the soles of foot are sensing force/pressure signals from these areas and are used for detecting the walking intention and states. The tilt sensor acquires roll and pitch signal from area of vertebrae lumbales and reflects the pose of the upper limb. We could recognize the more detailed user's walking intention such as 'start walking', 'start of right or left foot forward', and 'stop walking' by the combination of FSR and tilt signals can recognize.

보행속도가 비만인의 하지관절각과 지면반발력에 미치는 영향 (Effect of Walking Speed on Angles of Lower Extremity and Ground Reaction Force in the Obese)

  • 김태완
    • 한국운동역학회지
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    • 제16권4호
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    • pp.83-94
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    • 2006
  • The purpose of this study is to elucidate how walking speed influences on change of angles of lower extremity and ground reaction force in normal and obese people. One group with normal body weight who were experimented at a standard speed of 1.5m/s and the other obese group were experimented at two different walking speeds (standard speed of 1.5m/s and self-selected speed of 1.3m/s). We calculated angles of lower extremity and ground reaction force during stance phase through video recording and platform force measuring. When the obese group walked at the standard speed, dorsi-flexion angle of ankle got bigger and plantar-flexion angle of ankle got smaller, which were not statistically significant. There was no significant difference of knee joint angles between normal and obese group at the same speed walking but significant post hoc only for the first flexion of knee joint in obese group. $F_z1$ was bigger than $F_z3$ in vertical axis for ground reaction force in both groups at the standard speed walking and the same force value at self-selected speed in obese group. $F_y3$ was always bigger than $F_y1$ in anterior-posterior axis in both groups.

생체역학적 분석을 통한 보행 부하 감소용 인솔 개발 (The Development of the Insole for Gait Load Decreasing by Biomechanics Analysis)

  • 이창민;오연주
    • 대한인간공학회지
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    • 제24권4호
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    • pp.23-30
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    • 2005
  • The mailman's shoes should be designed in due consideration of occupational features they spend most of times to walk. For that reason, the shoes required functions to reduce the foot fatigue and to protect body by dispersing the body weight to the whole foot. In this research, for the functional improvement of the insole, insoles are investigated and analyzed by biomechanics experimentation. Under the base of these experimental results, we develop insoles that can reduce the body load and muscular-skeletal disorder. The pressures are concentrated on the metatarsus and heel by the result of analyzing pressure distributions of the using shoes. Accordingly, we offer the prototype functional insole that is ranked from high pressure to low pressure on the base of a shock absorb function. This prototype functional insole is examined for statistical significance by pressure distribution areas. The experimental results show that pressure areas are dispersed to whole foot, for this reason, pressures of the metatarsus and heel are reduced. Results of this research can not only improve the function of insoles which is suitable for occupational features, but also be a base on constructing data bases for biomechanics gait insoles.

하지절단자의 보행 복원을 위한 단단부 잔존근육의 생체역학적 등속성 운동 효과에 대한 연구 (The effect of biomechanical isokinetic excercise of residual muscles in the stump on restoring gait of transfemoral and transtibial amputees)

  • 홍정화;송창호;이재연;문무성
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 2003년도 춘계학술대회 논문집
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    • pp.723-728
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    • 2003
  • The physical restoration technology for lower limb amputees is being advanced as the biomechatronics is being applied to the area of rehabilitation. As the advanced prosthetics for lower limb amputees are introduced, a suitable prescription of biomechanical rehabilitation training becomes important to utilize the advanced full features of the devices. Since lower limb amputation significantly affects biomechanical balance of mosculoskeletal system for gait, an appropriate and optimal biomechanical training and exercise should be provided to rebalance the system before wearing the prostheses. Particularly, biomechanical muscular training for hip movements in the both affected and sound lower limbs is important to achieve a normal-like ambulation. However, there is no study to understand the effect of hip muscle strength on the gait performance of lower limb amputees. To understand the hip muscle strength characteristics for normal and amputated subjects, the isokinetic exercises for various ratios of concentric contraction to eccentric contraction were performed for hip flexion-extension and adduction-abduction. As a results. biomechanical isokinetic training protocols and performance measurement methodologies for lower limb amputees were developed in this study. Using the protocols and measurement methods, it has been understood that the appropriate and optimal biomechanical prescription for the rehabilitation process for lower limb amputees is important for restoring their gait ability

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