Development and simulation of a passive upper extremity orthosis for amyoplasia:

Journal of Rehabilitation and Assistive Technologies Engineering

Erik FJensen¹ 

关键词: Passive orthosis;    partial gravity balance;    upper extremity;    arthrogryposis;    amyoplasia;    musculoskeletal modelling;   

DOI  :  10.1177/2055668318761525

学科分类：工程和技术（综合）

来源: Sage Journals

【 摘 要 】

IntroductionPeople who are born with arthrogryposis multiplex congenita are typically not able to perform activities of daily living (ADL) due to decreased muscle mass, joint contractures and unnatural upper extremity positioning. They are, therefore, potential users of an assistive device capable of aiding in ADL and increasing their independence. A passive orthosis can support the weight of their arm against gravity, allowing them to perform movements with less effort.MethodsThis study presents a prototype design with four degrees-of-freedom that uses musculoskeletal modelling to optimize the stiffness of the springs in the device to partially gravity balance the upper extremity while compensating for the usual internally rotated glenohumeral joint. A single subject-specific musculoskeletal model was developed to simulate the effects of the passive orthosis during 10 static postures during ADL.ResultsFor a given configuration using a mono- and a bi-articular spring, the simulations showed that spring st...

【 授权许可】

CC BY