Quantification of tibiofemoral shear and compressive loads using a MRI-based EMG-driven knee model.
J Appl Biomech
; 29(2): 229-34, 2013 Apr.
Article
em En
| MEDLINE
| ID: mdl-22813836
ABSTRACT
The purpose of this study is to describe an MRI-based EMG-driven knee model to quantify tibiofemoral compressive and shear forces. Twelve healthy females participated. Subjects underwent 2 phases of data collection (1) MRI assessment of the lower extremity to quantify muscle volumes and patella tendon orientation and (2) biomechanical evaluation of a drop-jump task. A subject-specific EMG-driven knee model that incorporated lower extremity kinematics, EMG, and muscle volumes and patella tendon orientation estimated from MRI was developed to quantify tibiofemoral shear and compressive forces. A resultant anterior tibial shear force generated from the ground reaction force (GRF) and muscle forces was observed during the first 30% of the stance phase of the drop-jump task. All of the muscle forces and GRF resulted in tibiofemoral compression, with the quadriceps force being the primary contributor. Acquiring subject-specific muscle volumes and patella tendon orientation for use in an EMG-driven knee model may be useful to quantify tibiofemoral forces in persons with altered patella position or muscle atrophy following knee injury or pathology.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Imageamento por Ressonância Magnética
/
Ligamento Patelar
/
Músculo Esquelético
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Extremidade Inferior
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Eletromiografia
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Articulação do Joelho
Limite:
Adult
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Female
/
Humans
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article