inverse kinematics tool in opensim joint articular mechanics (jam)  (OpenSim Ltd)

Journal: Scientific Reports

Article Title: The impact of PCA derived gait kinematic variations on estimated medial knee contact forces in a knee osteoarthritis population

doi: 10.1038/s41598-025-90804-8

Figure Lengend Snippet: Functionally relevant changes (changes exceeding ± 10% BW) as result of kinematic variations in medial (MED) compartment knee contact forces and relative changes in lateral (LAT) compartment (relevant changes are depicted with filled red and blue circle) expressed as a % difference in body weight (BW) compared to knee contact forces estimated using the mean healthy gait pattern (black dotted lines), at the top. Solid grey lines are the cut-off/threshold for functionally relevant knee contact force changes (see Material and Methods section “ ”). Dotted grey lines define peak 1 (P1) and peak 2 (P2) of the gait cycle. Below (bottom) are the kinematics of the different joints contributing to the top 50% (see Fig. ) of the observed variation for each specific mode depicted as ± 1 STD (red, blue respectively). Grey dashed line defines the stance phase.

Article Snippet: Joint kinematics were calculated using the inverse kinematics tool in OpenSim Joint Articular Mechanics (JAM) using a validated musculoskeletal model with combined 12 degrees of freedom for the tibiofemoral (6DOF) and patellofemoral (6DOF) joints .

Techniques:

Journal: Scientific Reports

Article Title: The impact of PCA derived gait kinematic variations on estimated medial knee contact forces in a knee osteoarthritis population

doi: 10.1038/s41598-025-90804-8

Figure Lengend Snippet: Functionally relevant changes (changes exceeding ± 10% BW) as result of kinematic variations in medial (MED) compartment knee contact forces and relative changes in lateral (LAT) compartment (relevant changes are depicted with filled red and blue circle) expressed as a % difference in body weight (BW) compared to knee contact forces estimated using the mean knee OA gait pattern (black dotted lines), at the top. Solid grey lines are the cut-off/threshold for functionally relevant knee contact force changes (see Material and Methods section “ ”). Dotted grey lines define peak 1 (P1) and peak 2 (P2) of the gait cycle. Below (bottom) are the kinematics of the different joints contributing to the top 50% (see Fig. ) of the observed variation for each specific mode depicted as ± 1 STD (red, blue respectively). Grey dashed line defines the stance phase.

Article Snippet: Joint kinematics were calculated using the inverse kinematics tool in OpenSim Joint Articular Mechanics (JAM) using a validated musculoskeletal model with combined 12 degrees of freedom for the tibiofemoral (6DOF) and patellofemoral (6DOF) joints .

Techniques:

Journal: Scientific Reports

Article Title: The influence of the marker set on inverse kinematics results to inform markerless motion capture annotations

doi: 10.1038/s41598-025-97219-5

Figure Lengend Snippet: Markers used for inverse kinematics (number total).

Article Snippet: All dynamic trials were pre-processed in Python (version 3.11) prior to running OpenSim’s inverse kinematics tool (version 4.5).

Techniques:

Journal: Scientific Reports

Article Title: The influence of the marker set on inverse kinematics results to inform markerless motion capture annotations

doi: 10.1038/s41598-025-97219-5

Figure Lengend Snippet: Overview of the marker set, and joint centres used to calculate the inverse kinematics. Anatomical markers are displayed in red, mid-segment markers in green and joint centres and mid-points in blue. Note that only labelled markers are displayed in colour. Modified image generated in OpenSim v4.5 ( https://simtk.org/ ; ).

Article Snippet: All dynamic trials were pre-processed in Python (version 3.11) prior to running OpenSim’s inverse kinematics tool (version 4.5).

Techniques: Marker, Modification, Generated