Work

Identification of Individual Muscle Length Parameters from Measurements of Passive Joint Moment Around the Ankle Joint

Year: 2012

Type: article

Abstract: In this study, we proposed a method for estimating muscle length parameters on an individual basis from measured data based on a musculo-skeletal structure with a Hill-type muscle model. Passive joint moments of the ankle were measured for 4 healthy subjects in two different knee positions, i.e., in knee flexion and extension, using manual measurement apparatus. Estimation of muscle length parameters based on measurement data from each subject was performed using a two-dimensional musculo-skeletal model of the lower limb with a Hill-type muscle model. Predicted passive joint moment properties using the estimated parameters were consistent with measured data. The estimated length parameters of muscles differed between subjects depending on their passive joint moment properties. These observations suggest that the proposed estimation method is available to identify muscle length parameters required for a quantification of ankle joint function and the musclo-skeletal model analyses on an individual basis.

Source: Journal of Biomechanical Science and Engineering

DOI: 10.1299/jbse.7.168

Authors: Hisashi NAITO, Yasushi AKAZAWA, Ayu MIURA, Takeshi MATSUMOTO, Masao TANAKA

Institutions: The University of Osaka, The Hyogo Institute of Assistive Technology

Language: English

Topic: Muscle activation and electromyography studies

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: bronze

Funder: Japan Society for the Promotion of Science

Awards: Technique for Estimmation of Motion Status and Intension for Prosthesis Users and Development of a New Hip Disarticulation Prosthesis, Mechanism of passive joint moment (PJM) on ankle joint and estimation method of the PJM with ankle movement