Page 87. 85 Chapter 5 The effect of PCSA and moment arm distributions on the load sharing of arm ... more Page 87. 85 Chapter 5 The effect of PCSA and moment arm distributions on the load sharing of arm muscles M. Praagman, J. Praagman, EKJ Chadwick, FCT van der Helm, HEJ Veeger. Submitted for publication Page 88. Muscle ...
Medical & Biological Engineering & Computing, 2011
The Delft Shoulder and Elbow Model (DSEM), a musculoskeletal model of the shoulder and elbow has ... more The Delft Shoulder and Elbow Model (DSEM), a musculoskeletal model of the shoulder and elbow has been extensively developed since its introduction in 1994. Extensions cover both model structures and anatomical data focusing on the addition of an elbow part and muscle architecture parameters. The model was also extended with a new inverse-dynamics optimization cost function and combined inverse-forward-dynamics models. This study is an update on the developments of the model over the last decade including a qualitative validation of the different simulation architectures available in the DSEM. To validate the model, a dynamic forward flexion motion was performed by one subject, of which the motion data and surface EMG-signals of 12 superficial muscles were measured. Patterns of the model-predicted relative muscle forces were compared with their normalized EMG-signals. Results showed relatively good agreement between forces and EMG (mean correlation coefficient of 0.66). However, for some cases, no force was predicted while EMG activity had been measured (false-negatives). The DSEM has been used and has the potential to be used in a variety of clinical and biomechanical applications.
Objective. To evaluate the relationship between net moments for the glenohumeral joint as calcula... more Objective. To evaluate the relationship between net moments for the glenohumeral joint as calculated with a model that is easy to apply (Static Strength Prediction Program (SSPP)) and the internal forces, calculated with a simulation model of the human shoulder (Delft Shoulder Model, DSM).
Page 87. 85 Chapter 5 The effect of PCSA and moment arm distributions on the load sharing of arm ... more Page 87. 85 Chapter 5 The effect of PCSA and moment arm distributions on the load sharing of arm muscles M. Praagman, J. Praagman, EKJ Chadwick, FCT van der Helm, HEJ Veeger. Submitted for publication Page 88. Muscle ...
Medical & Biological Engineering & Computing, 2011
The Delft Shoulder and Elbow Model (DSEM), a musculoskeletal model of the shoulder and elbow has ... more The Delft Shoulder and Elbow Model (DSEM), a musculoskeletal model of the shoulder and elbow has been extensively developed since its introduction in 1994. Extensions cover both model structures and anatomical data focusing on the addition of an elbow part and muscle architecture parameters. The model was also extended with a new inverse-dynamics optimization cost function and combined inverse-forward-dynamics models. This study is an update on the developments of the model over the last decade including a qualitative validation of the different simulation architectures available in the DSEM. To validate the model, a dynamic forward flexion motion was performed by one subject, of which the motion data and surface EMG-signals of 12 superficial muscles were measured. Patterns of the model-predicted relative muscle forces were compared with their normalized EMG-signals. Results showed relatively good agreement between forces and EMG (mean correlation coefficient of 0.66). However, for some cases, no force was predicted while EMG activity had been measured (false-negatives). The DSEM has been used and has the potential to be used in a variety of clinical and biomechanical applications.
Objective. To evaluate the relationship between net moments for the glenohumeral joint as calcula... more Objective. To evaluate the relationship between net moments for the glenohumeral joint as calculated with a model that is easy to apply (Static Strength Prediction Program (SSPP)) and the internal forces, calculated with a simulation model of the human shoulder (Delft Shoulder Model, DSM).
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