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압력중심 좌표를 이용한 휠체어 사용자의 앉기 자세조절능력 평가 : 예비 연구
김혜령,김지수,정민,김지영,황선홍 호서대학교 기초과학연구소 2019 기초과학연구 논문집 Vol.27 No.1
Seated balance is the essential ability to maintain a posture without sway on a solid support surface, especially for wheelchair users for activities of daily living(ADL), transferring, and avoiding fall. The center of pressure(COP) has been using as a useful indicator for quantitative balance evaluation. The purpose of this study was to assess the seated balance using COP trajectory analysis methods. Sixteen healthy adult people and sixteen wheelchair users participated in this study. Every subject was asked to maintain four different sitting positions(upright, forward, backward, and side leaning) for 20 seconds. The COP was recorded using a pressure mat while subjects were performing those four-position sitting tests. Mean velocity in anteroposterior(AP) and mediolateral(ML) directions, the phase plane parameter, the root mean square distance in AP and ML directions were analyzed and compared between the two groups. Variables in upright, forward, and backward leaning positions showed similar results in mean comparisons. However, most variables in side leaning, the patient group showed significantly larger than those of the healthy group. Based on these results, the wheelchair user group has worse seated balance ability than the healthy group in the seated balance tests. Also, If we normalize the degree of leaning, the COP will be useful for the seated balance assessment.
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보행에 제한이 있는 뇌졸중 환자들의 한국어 번안 기능적 앉기 검사의 신뢰도와 타당도
안승헌 ( An Seung-heon ),이병권 ( Lee Byoung-kwon ) 대구대학교 특수교육재활과학연구소 2016 특수교육재활과학연구 Vol.55 No.3
In Korea, there is no standardized assessment tool for sitting balance assessment of stroke patients. The purpose of this study was to adopt FIST into Korean in order to verify the reliability and validity of a sitting balance assessment of stroke patients who had limited walking abilities. The study was held with 43 subjects who were measured using the FIST individual item score and Inter-rater reliability with the Weight Kappa Coefficient and Intra Class Coefficient (ICC2,1). The relevance between the individual items of FIST and total scores was calculated through Cronbach`s a coefficient. In addition, absolute reliability indexes including the Standard Error Measurement(SEM) of FIST and Minimal Detectable Change(MDC) were measured. Concurrent Validity of the FIST Trunk Control Test(TCT), Postural Assessment Scale(PAS) for Stroke, Modified Barthel Index(MBI) were measured in relation to the Spearman correlation coefficient. According to this study, the Weighted Kappa coefficient of the FIST individual items 1-14 was 0.80 to 0.96 times, and the FIST total score was ICC=.99 (.98~.99). The relevance of the FIST score and individual items was r=.82~.93 which showed high relevant levels between the two items. The Crohn`s alpha coefficient of FIST bar was high at 0.97. The SEM of FIST was 0.95 points and was less than 10%(average 29.95score). The MDC was fairly reliable by only being 2.63 points, less than 20%(FIST highest rating 44score). The concurrent validity of FIST has been confirmed to have a very high correlation with the TCT(r=.85), PASS(r=.82) and MBI(r=.81). The FIST assessment has been found to be very suitable for a sitting balance evaluation of stroke patients with limited walking. Therefore, FIST could be useful as a secondary evaluation method in assessing functions ranging from sitting balance to standing balance and evaluating the dynamic balance skills needed for clinical postural and gait.
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Study on the Design and Analysis of a 4-DOF Robot for Trunk Rehabilitation
Amre Eizad(에이자드 아믈),Sanghun Pyo(표상훈),Geonhyup Lee(이건협),Sung-Ki Lyu(류성기),Jungwon Yoon(윤정원) 한국기계가공학회 2020 한국기계가공학회지 Vol.19 No.7
This paper presents the development of a robotic system for rehabilitation of the trunk’s ability to maintain postural control under different balance conditions. The system, developed with extensive input from rehabilitation and biomedical engineering experts, consists of a seat mounted on a robotic mechanism capable of moving it with four degrees of freedom (3 rotational and 1 translational). The seat surface has built in instrumentation to gauge the movements of the user’s center of pressure (COP) and it can be moved either to track the movements of the COP or according to operator given commands. The system allows two types of leg support. A ground mounted footrest allows participation of legs in postural control while a seat connected footrest constrains the leg movement and limits their involvement in postural control. The design evolution over several prototypes is presented and computer aided structural analysis is used to determine the feasibility of the designed components. The system is pilot tested by a stroke patient and is determined to have potential for use as a trunk rehabilitation tool. Future works involve more detailed studies to evaluate the effects of using this system and to determine its efficacy as a rehabilitation tool.
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