Linearity in force – length Relation and Determination of Muscle Forces
Journal Title: International Journal of Contemporary Research and Review - Year 2017, Vol 8, Issue 1
Abstract
This paper examines the force–length relations of skeletal muscle actuators during normal human gait based on gait data analysis. Instead of time or gait cycle, the joint coordinates were taken as independent parameters in the study of force–length relations. Force–length relations are nonlinear and non-analytic functions in the domain of each gait cycle. We propose to carry out kinematic segmentation of each joint coordinate function into four kinematic states depending on its displacement, velocity and acceleration for studying the force–length relations. When considered segment-wise, linear fit to force–length curves were found statistically significant. Thus it was seen that the skeletal muscles behaved linearly when evaluated in terms of the kinematic segments in the gait cycle. Hence a method to evaluate muscle force distribution was proposed using linear equivalent static formulation based on strain energy minimization as a rapid procedure in comparison with static optimization algorithm. The method resulted in simplified modeling and analysis of musculo-skeletal system to draw interim conclusions before the fully fledged musculo-skeletal analysis is carried out. The proposed method was applied on a single degree of freedom case and was verified with established analysis procedure, namely static optimization using OpenSim, an open-source software system.
Authors and Affiliations
Raghu Kumar C, Dr. Somasundaran T. P.
Keywords
Related Articles
- EP ID EP312699
- DOI 10.15520/ijcrr/2017/8/1/106
- Views 70
- Downloads 0
Evaluation ofRouting Protocols inWirelessAd-HocNetworks under SecurityAttacks
Wirelessnetworkshavecertainly beenarevolutionintoday’stechnologyasoneofthe mostvitalandactivefieldsinthe communicationindustries.These wireless ad-hoc networksconsists ofindependentnodes withdecentralizedadministration...
A Costasloop with Differential Coding
Whena Costasloop is usedfor QAM demodulation, thereceivedconstellation diagram rotates. Rotationcausesdegradation of thesymbolerrorrate(SER). In thispaperweproposedifferentialcodingtoeliminatetheeffects of rotatio...
Mathematical Development of the Adjoint Circuit Method –A Tutorial
Rigorousmathematicalbackgroundforthewell-knownadjointcircuitmethod has beenpresented
Nasal Foreign Body: A Retrospective Study
Background: Nasal foreign bodies are a frequent accident to otolaryngologist especially in young children. They are generally harmless and can be managed easily in outpatient department but may become life...
Management PracticeCompare different theories of motivation using examples from the literature and our experience
The success or failure of an organization is dependent on the work and motivation of its employees. Employee motivation isnormally a product of their commitment to their role and to the organiz...