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Subject-specific musculoskeletal parameters of wrist flexors and extensors estimated by an EMG-driven musculoskeletal model

Subject-specific musculoskeletal parameters of wrist flexors and extensors estimated by an EMG-driven musculoskeletal model
Subject-specific musculoskeletal parameters of wrist flexors and extensors estimated by an EMG-driven musculoskeletal model
An EMG-driven musculoskeletal model is implemented to estimate subject-specific musculoskeletal parameters such as the optimal physiological muscle length, the tendon slack length and the maximum isometric muscle force of flexor and extensor muscle groups crossing the wrist, as well as biomechanical indexes to quantify the muscle operating range, the stiffness of the musculotendon actuators, and the contribution of the muscle fibres to the joint moment.

Twelve healthy subjects (11 males and 1 female, mean age 31.1 ± 8.7 years) were instructed to perform isometric maximum voluntary contractions of wrist flexors and extensors. Recorded EMGs were used as input to the model and the root mean square error (RMSE) between measured and predicted torque was minimised to estimate the subject-specific musculotendon parameters. The model was validated and the RMSE and the normalised RMSE calculated during estimation and validation phases are compared.
Estimated subject-specific musculoskeletal parameters vary in a physiological range, while the biomechanical indexes are in agreement with previously published data.

The proposed methodology proved to be effective for the in vivo estimation of physiological parameters of the musculotendon complex and has potential as an investigative tool to distinguish aetiological differences among subjects affected by musculoskeletal disorders.
wrist, emg, neuromusculoskeletal model, flexors, extensors, estimation
1350-4533
531-540
Colacino, Francesco M.
032e78c3-1140-46a7-afae-0392634b5954
Rustighi, Emiliano
9544ced4-5057-4491-a45c-643873dfed96
Mace, Brian R.
cfb883c3-2211-4f3a-b7f3-d5beb9baaefe
Colacino, Francesco M.
032e78c3-1140-46a7-afae-0392634b5954
Rustighi, Emiliano
9544ced4-5057-4491-a45c-643873dfed96
Mace, Brian R.
cfb883c3-2211-4f3a-b7f3-d5beb9baaefe

Colacino, Francesco M., Rustighi, Emiliano and Mace, Brian R. (2012) Subject-specific musculoskeletal parameters of wrist flexors and extensors estimated by an EMG-driven musculoskeletal model. Medical Engineering & Physics, 34 (5), 531-540. (doi:10.1016/j.medengphy.2011.08.012). (PMID:21937254)

Record type: Article

Abstract

An EMG-driven musculoskeletal model is implemented to estimate subject-specific musculoskeletal parameters such as the optimal physiological muscle length, the tendon slack length and the maximum isometric muscle force of flexor and extensor muscle groups crossing the wrist, as well as biomechanical indexes to quantify the muscle operating range, the stiffness of the musculotendon actuators, and the contribution of the muscle fibres to the joint moment.

Twelve healthy subjects (11 males and 1 female, mean age 31.1 ± 8.7 years) were instructed to perform isometric maximum voluntary contractions of wrist flexors and extensors. Recorded EMGs were used as input to the model and the root mean square error (RMSE) between measured and predicted torque was minimised to estimate the subject-specific musculotendon parameters. The model was validated and the RMSE and the normalised RMSE calculated during estimation and validation phases are compared.
Estimated subject-specific musculoskeletal parameters vary in a physiological range, while the biomechanical indexes are in agreement with previously published data.

The proposed methodology proved to be effective for the in vivo estimation of physiological parameters of the musculotendon complex and has potential as an investigative tool to distinguish aetiological differences among subjects affected by musculoskeletal disorders.

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More information

Published date: June 2012
Keywords: wrist, emg, neuromusculoskeletal model, flexors, extensors, estimation
Organisations: Dynamics Group

Identifiers

Local EPrints ID: 355221
URI: https://eprints.soton.ac.uk/id/eprint/355221
ISSN: 1350-4533
PURE UUID: 0b673a29-4b74-4de7-bc73-b70261f45b37
ORCID for Emiliano Rustighi: ORCID iD orcid.org/0000-0001-9871-7795

Catalogue record

Date deposited: 19 Aug 2013 10:34
Last modified: 27 Feb 2019 01:33

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