A master thesis from Aalborg University
Development of a Passive Upper Extremity Orthosis for Amyoplasia
Author(s)
Term
4. semester
Education
Publication year
2017
Submitted on
2017-06-07
Pages
80 pages
Abstract
Those who are born with amyoplasia are typically not able to perform activities of daily living (ADL) due to decreased muscle mass, joint contractures, and unnatural limb positioning. It is possible to use an orthosis to aid in ADL and increase their independency. A passive orthosis can support the weight of their arm against gravity, allowing them to perform movements with less muscle force. This study presents a prototype design that uses musculoskeletal modeling to optimise spring stinesses to gravitationally balance the arm while compensating for the excessive internal rotation of the glenohumeral joint. A subject-specic musculoskeletal was developed to simulate the eects of the orthosis during ADL. The simulations showed that a biarticular spring with a stiness of 233.33 Nm􀀀1 was able to lower the maximal muscle activity to a level in which tasks of ADL can potentially be performed.
Those who are born with amyoplasia are typically not able to perform activities of daily living (ADL) due to decreased muscle mass, joint contractures, and unnatural limb positioning. It is possible to use an orthosis to aid in ADL and increase their independency. A passive orthosis can support the weight of their arm against gravity, allowing them to perform movements with less muscle force. This study presents a prototype design that uses musculoskeletal modeling to optimise spring stinesses to gravitationally balance the arm while compensating for the excessive internal rotation of the glenohumeral joint. A subject-specic musculoskeletal was developed to simulate the eects of the orthosis during ADL. The simulations showed that a biarticular spring with a stiness of 233.33 Nm􀀀1 was able to lower the maximal muscle activity to a level in which tasks of ADL can potentially be performed.
Keywords
Documents
Colophon: This page is part of the AAU Student Projects portal, which is run by Aalborg University. Here, you can find and download publicly available bachelor's theses and master's projects from across the university dating from 2008 onwards. Student projects from before 2008 are available in printed form at Aalborg University Library.
If you have any questions about AAU Student Projects or the research registration, dissemination and analysis at Aalborg University, please feel free to contact the VBN team. You can also find more information in the AAU Student Projects FAQs.