Tutorial: IOR Gait Full-Body Model

This tutorial explains how to implement the IOR Full Body Model in Visual3D.

The IOR Full Body Model is a combination of the IOR Multi-Segment Trunk, and the IOR Lower Extremity Model. The naming convention used in this tutorial follows Serge Van Sint Jan's convention.

Downloads

Sample files may be downloaded here.

The zip file contains:

1. C3D files which you can use to follow along with the tutorial
2. A model template which contains the landmark & segment definitions
3. A script which contains the planar & joint angle definitions
4. A report template which plots the relevant kinematics (joint angles & planar angles)
5. A completed CMO file

Target Placement

LCAJ/RCAJ (LA/RA): Left/Right acromion^{:p. 45}

SJN (IJ): Deepest point of incisura jugularis^{:p. 34}

SXS (PX): Xiphoid proces, i.e. most caudal point of the sternum^{:p. 37}

CV7 (C7): Spinous process of the seventh cervical vertebrae^{:p. 28}

TV2 (T2): Second thoracic vertebrae^{:p. 29}

TV7 (MAI): Midpoint between the inferior angles of the most caudal points of the two scapulae ^{:p. 61}

LV1, LV3, LV5 (L1, L3, L5): First, third and fifth lumbar vertebrae^{:p. 29}

LIAS/RIAS (LASIS/RASIS): Left/Right anterior superior iliac spine^{:p. 106}

LIPS/RIPS (LPSIS/RPSIS): Left/Right posterior superior iliac spine^{:p. 107}

LFTC/RFTC (LGT/RGT): Most lateral prominence of the greater trochanter^{:p. 116}

LFLE/RFLE (LLE/RLE): Most lateral prominence of the lateral femoral epicondyle^{:p. 122}

LFME/RFME (LME/RME): Most medial prominence of the medial femoral epicondyle^{:p. 120}

LFAX/RFAX (LHF/RHF): Proximal tip of the head of the fibula^{:p. 154}

LTTC/RTTC (TT/RTT): Most anterior border of the tibial tuberosity^{:p. 144}

LFAL/RFAL (LLM/RLM): Lateral prominence of the lateral malleolus^{:p. 158}

LTAM/RTAM (LMM/RMM): Most medial prominence of the medial malleolus^{:p. 148}

LFCC/RFCC (LCA/RCA): Aspect of the achilles tendon insertion on the calcaneous^{:p. 162}

LFM1/RFM1 (LFM/RFM): Dorsal margin of the first metatarsal head^{:p. 173}

LFM2/RFM2 (LSM/RSM): Dorsal aspect of the second metatarsal head^{:p. 173}

LFM5/RFM5 (LVM/RVM): Dorsal margin of the fifth metatarsal head^{:p. 173}

Segment Definition

Pelvis

The pelvis segment coordinate system is consistent with the Coda Pelvis, from which the Left and Right Hip Joint centers are automatically created.

LIAS/RIAS (LASIS/RASIS): Left/Right anterior superior iliac spine:p. 106 LIPS/RIPS (LPSIS/RPSIS): Left/Right posterior superior iliac spine:p. 107

Pelvis Landmarks
1. Create SCRM: Click Landmarks button Click Add New Landmark button Create Landmark: SCRM    Landmark Name: SCRM    Define Orientation Using:    Starting Point: RIPS    Ending Point: LIPS Offset Using the Following ML/AP/AXIAL Offsets:    X: 0.0    Y: 0.0    Z: 0.5 Check: Offset by Percent (1.0 = 100%) Check: Calibration Only Landmark

Pelvis Definition

1. Create Pelvis Segment: In the Segments tab, select Pelvis in the Segment Name box. In Segment Type, select CODA Click on the Create Segment button. In the Pelvis dialog:    Define Calibration Targets    R.ASIS: RIAS    L.ASIS: LIAS    R.PSIS: RIPS    L.PSIS: LIPS    Select Tracking Targets:      LIAS, LIPS, RIAS, RIPS Close Coda Segment Markers dialog box Click on Build Model. Click on Close Tab before proceeding. 5. Modify the Segment Coordinate System: Define the Segment Orientation as:    A/P Axis: +X    Distal to Proximal: +Y

Thorax Segment

This marker set is consistent with the Rizzoli Gait model and the ISB recommendations.

LCAJ/RCAJ (LA/RA): Left/Right acromion^{:p. 45}

SJN (IJ): Deepest point of incisura jugularis^{:p. 34}

SXS (PX): Xiphoid proces, i.e. most caudal point of the sternum^{:p. 37}

CV7 (C7): Spinous process of the seventh cervical vertebrae^{:p. 28}

TV2 (T2): Second thoracic vertebrae^{:p. 29}

TV7 (MAI): Midpoint between the inferior angles of the most caudal points of the two scapulae ^{:p. 61}

Thorax Definition

1. Create Thorax/Ab: In the Segments tab, select Thorax/Ab in the Segment Name box. Click Kinematic Only. Click on the Create Segment button. In the Thorax/Ab tab, enter these values:    Define Proximal Joint and Radius    Lateral: None     Joint: TV2     Medial: None         Radius: 0.5*DISTANCE(RCAJ,LCAJ)    Define Distal Joint and Radius    Lateral: None     Joint: TV7     Medial: None         Radius: 0.5*DISTANCE(RCAJ,LCAJ)    Extra Target to Define Orientation    Location: Anterior     SXS    Select Tracking Targets:      SJN, SXS, TV2, TV7 Click on Build Model. Click on Close Tab before proceeding. 5. Modify the Segment Coordinate System: Define the Segment Orientation as:    A/P Axis: +X    Distal to Proximal: +Y

Thigh Segment

The RIGHT_HIP/LEFT_HIP landmarks are used to define the thigh segments. These landmarks are created automatically when the Pelvis segment is defined (so the Pelvis must be defined prior to creating the thigh segments).

LFTC/RFTC (LGT/RGT): Most lateral prominence of the greater trochanter:p. 116 LFLE/RFLE (LLE/RLE): Most lateral prominence of the lateral femoral epicondyle:p. 122 LFME/RFME (LME/RME): Most medial prominence of the medial femoral epicondyle:p. 120

Thigh Definition

1. Create Right Thigh: In the Segments tab, select Right Thigh in the Segment Name box. Click on the Create Segment button. In the Right Thigh tab, enter these values:    Define Proximal Joint and Radius    Lateral: None     Joint: RIGHT_HIP     Medial: None         Radius: 0.5*DISTANCE(RIGHT_HIP,LEFT_HIP)    Define Distal Joint and Radius    Lateral: RFLE     Joint: None     Medial: RFME         Select Tracking Targets:      RIGHT_HIP, RFLE, RFME, RFTC Click on Build Model. Click on Close Tab before proceeding. 5. Modify the Segment Coordinate System: Define the Segment Orientation as:    A/P Axis: +X    Distal to Proximal: +Y

Shank Segment

The segment coordinate system is different from the conventional gait model because the shank segment is defined according to markers located on the tibia and fibula, not the femur as with the Conventional Gait Model.

LFAX/RFAX (LHF/RHF): Proximal tip of the head of the fibula:p. 154 LTTC/RTTC (TT/RTT): Most anterior border of the tibial tuberosity:p. 144 LFAL/RFAL (LLM/RLM): Lateral prominence of the lateral malleolus:p. 158 LTAM/RTAM (LMM/RMM): Most medial prominence of the medial malleolus:p. 148

Shank Landmarks

1. Create RKNE Joint Center: Click Landmarks button Click Add New Landmark button Create Landmark: RKNE    Landmark Name: RKNE    Define Orientation Using:    Starting Point: RFLE    Ending Point: RFME Offset Using the Following AXIAL Offset: 0.5 Check: Offset by Percent (1.0 = 100%) Check: Calibration Only Landmark 2. Create RANK Joint Center: Click Landmarks button Click Add New Landmark button Create Landmark: RANK    Landmark Name: RANK    Define Orientation Using:    Starting Point: RFAL    Ending Point: RRAM Offset Using the Following AXIAL Offset: 0.5 Check: Offset by Percent (1.0 = 100%) Check: Calibration Only Landmark 3. Create RTTC_PROJ: Click Landmarks button Click Add New Landmark button Create Landmark: RTTC_PROJ    Landmark Name: RTTC_PROJ    Define Orientation Using:    Starting Point: RFAX    Ending Point: RFAL    Lateral Object: RTAM    Project From: RTTC Do NOT Check: Offset by Percent (1.0 = 100%) Check: Calibration Only Landmark 4. Create RSK_PROX: Click Landmarks button Click Add New Landmark button Create Landmark: RSK_PROX    Landmark Name: RSK_PROX    Define Orientation Using:    Starting Point: RANK    Ending Point: RTTC_PROJ    Lateral Object: Leave Blank    Project From: RKNE Do NOT Check: Offset by Percent (1.0 = 100%) Check: Calibration Only Landmark

Shank Definition

1. Create Right Shank: In the Segments tab, select Right Shank in the Segment Name box. Click on the Create Segment button. In the Right Shank tab, enter these values:    Define Proximal Joint and Radius    Lateral: None     Joint: RSK_PROX     Medial: None         Radius: 0.5*DISTANCE(RFLE,RFME)    Define Distal Joint and Radius    Lateral: RFAL     Joint: None     Medial: RTAM         Select Tracking Targets:      RFAL, RFAX, RTAM, RTTC Click on Build Model. Click on Close Tab before proceeding. 5. Modify the Segment Coordinate System: Define the Segment Orientation as:    A/P Axis: +X    Distal to Proximal: +Y

Foot Segment

The foot segment coordinate system is consistent with some version of the Conventional Gait Model.

The foot segment is created using the RANK/LANK landmarks which are described in the Shank Landmarks section.

LFAL/RFAL (LLM/RLM): Lateral prominence of the lateral malleolus^{:p. 158}

LTAM/RTAM (LMM/RMM): Most medial prominence of the medial malleolus^{:p. 148}

LFCC/RFCC (LCA/RCA): Aspect of the achilles tendon insertion on the calcaneous^{:p. 162}

LFM1/RFM1 (LFM/RFM): Dorsal margin of the first metatarsal head^{:p. 173}

LFM2/RFM2 (LSM/RSM): Dorsal aspect of the second metatarsal head^{:p. 173}

LFM5/RFM5 (LVM/RVM): Dorsal margin of the fifth metatarsal head^{:p. 173}

Kinetic Foot

Kinetic Foot Definition

1. Create Right Foot: In the Segments tab, select Right Foot in the Segment Name box. Click on the Create Segment button. In the Right Foot tab, enter these values:    Define Proximal Joint and Radius    Lateral: None     Joint: RANK     Medial: None         Radius: 0.5*DISTANCE(RFAL,RTAM)    Define Distal Joint and Radius    Lateral: RFM5     Joint: None     Medial: RFM1         Select Tracking Targets:      RFCC, RFM1, RFM2, RFM5 Click on Build Model. Click on Close Tab before proceeding. 5. Modify the Segment Coordinate System: Define the Segment Orientation as:    A/P Axis: +X    Distal to Proximal: +Y

Kinematic Foot

Kinematic Foot Landmarks
3. Create RFT_DIST: Click Landmarks button Click Add New Landmark button Create Landmark: RFT_DIST    Landmark Name: RFT_DIST    Define Orientation Using:    Starting Point: RFCC    Ending Point: RFM5    Lateral Object: RFM1    Project From: RFM2 Do NOT Check: Offset by Percent (1.0 = 100%) Check: Calibration Only Landmark

Kinematic Foot Definition

1. Create Right Virtual Foot: In the Segments tab, type Right Virtual Foot in the Segment Name box. Check the Kinematic Only Check Box. Click on the Create Segment button. In the Right Virtual Foot tab, enter these values:    Define Proximal Joint and Radius    Lateral: None     Joint: RFCC     Medial: None         Radius: 0.1    Define Distal Joint and Radius    Lateral: RFM5     Joint: RFT_DIST     Medial: None         Select Tracking Targets:      RFCC, RFM1, RFM2, RFM5 Click on Build Model. Click on Close Tab before proceeding. 5. Modify the Segment Coordinate System: Define the Segment Orientation as:    A/P Axis: +Y    Distal to Proximal: -X

Virtual Lab

Virtual Lab Landmarks

1. Create Lab_Origin: Click Landmarks button Click Add New Landmark button Create Landmark: Lab_Origin    Landmark Name: Lab_Origin Offset Using the Following ML/AP/AXIAL Offsets:    X: 0.0    Y: 0.0    Z: 0.0 Do NOT Check: Offset by Percent (1.0 = 100%) Do NOT Check: Calibration Only Landmark 2. Create Lab_AX: Click Landmarks button Click Add New Landmark button Create Landmark: Lab_Origin    Landmark Name: Lab_AX Offset Using the Following ML/AP/AXIAL Offsets:    X: 0.0    Y: 0.0    Z: 0.1 Do NOT Check: Offset by Percent (1.0 = 100%) Do NOT Check: Calibration Only Landmark 3. Create Lab_ML: Click Landmarks button Click Add New Landmark button Create Landmark: Lab_ML    Landmark Name: Lab_ML Offset Using the Following ML/AP/AXIAL Offsets:    X: 0.1    Y: 0.0    Z: 0.0 Do NOT Check: Offset by Percent (1.0 = 100%) Do NOT Check: Calibration Only Landmark 4. Create Pel_ML: Click Landmarks button Click Add New Landmark button Create Landmark: Pel_ML    Landmark Name: Pel_ML    Define Orientation Using:    Starting Point: Lab_Origin    Existing Segment: Pelvis Offset Using the Following ML/AP/AXIAL Offsets:    X: 0.1    Y: 0.0    Z: 0.0 Do NOT Check: Offset by Percent (1.0 = 100%) Do NOT Check: Calibration Only Landmark 5. Create Pel_ML_Proj: Click Landmarks button Click Add New Landmark button Create Landmark: Pel_ML_Proj    Landmark Name: Pel_ML_Proj    Define Orientation Using:    Starting Point: Lab_Origin    Ending Point: Lab_ML    Project Point: Pel_ML Do NOT Check: Offset by Percent (1.0 = 100%) Do NOT Check: Calibration Only Landmark 6. Create VLab_ML: Click Landmarks button Click Add New Landmark button Create Landmark: VLab_ML    Landmark Name: VLab_ML    Define Orientation Using:    Starting Point: Lab_Origin    Ending Point: Lab_ML    Project Point: Pel_ML_Proj Offset Using the Following ML/AP/AXIAL Offsets:    AXIAL: 0.1 Do NOT Check: Offset by Percent (1.0 = 100%) Do NOT Check: Calibration Only Landmark

Virtual Lab Definition

1. Create VLAB: In the Segments tab, type VLAB in the Segment Name box. Check the Kinematic Only Check Box. Click on the Create Segment button. In the VLAB tab, enter these values:    Define Proximal Joint and Radius    Lateral: None     Joint: Lab_Origin     Medial: None         Radius: 0.1    Define Distal Joint and Radius    Lateral: None     Joint: Lab_AX     Medial: None         Radius: 0.1    Extra Target to Define Orientation    Location: Lateral     VLab_ML    Select Tracking Targets:      Use Calibration Targets for Tracking Click on Build Model. Click on Close Tab before proceeding. 5. Modify the Segment Coordinate System: Define the Segment Orientation as:    A/P Axis: -X    Distal to Proximal: -Y

Planar Angles

To calculate the orientation of the trunk segments, planar angles are calculated to determine the orientation of the various segments relative to one another.

To calculate a planar angle, you need to either reference the ORIGINAL or PROCESSED folder when defining a target. If your targets have not been filtered or interpolated, you will not have a processed folder and will need to use the ORIGINAL. However, if you plan to process your target data in any way, you should do this now, prior to creating your planar angles.

This image was taken from the Multi-Segment trunk paper

The following abbreviations are used in naming the planar angles:

• FE Flexion/Extension
  
• LB Lateral Bending
  
• AR Axial Rotation
  

Spine FE & LB Landmarks

1. Create RPV_AX: Click Landmarks button Click Add New Landmark button Create Landmark: RPV_AX    Landmark Name: RPV_AX    Define Orientation Using:    Starting Point: LV5 Offset Using the Following ML/AP/AXIAL Offsets:    X: 0.0    Y: 0.0    Z: -0.05 Do NOT Check: Offset by Percent (1.0 = 100%) (Meters when not checked) Do NOT Check: Calibration Only Landmark (Not generated for assigned motion file(s))

FE Planar Angles

Below defines the orientation (flexion/extension) of the adjoining spine segments resolved in the pelvis coordinate system .

NOTE: For the FE Planar Angles, the same definitions for the angles are used for both the left & right side. This means that different sets of signals do not need to be created for the left and right sides (as with the LB and AR planar angles).

Spine FE Definitions

1. Create Sp5_Sp4_FE planar angle: Define Resulting Signal Name: Sp5_Sp4_FE Calculate a 4 point angle between the following targets:    1 - TARGET::PROCESSED::TV7    2 - TARGET::PROCESSED::TV2    3 - TARGET::PROCESSED::CV7    4 - TARGET::PROCESSED::TV2 Angle Direction: Left Hand Rule 3D Space: Always 0 to 180 degrees Projected onto Plane: XY Note: The reference segment will need to be changed to RPV within the text option. 2. Create Sp4_Sp3_FE planar angle: Define Resulting Signal Name: Sp4_Sp3_FE Calculate a 4 point angle between the following targets:    1 - TARGET::PROCESSED::LV1    2 - TARGET::PROCESSED::TV7    3 - TARGET::PROCESSED::TV2    4 - TARGET::PROCESSED::TV7 Angle Direction: Left Hand Rule 3D Space: Always 0 to 180 degrees Projected onto Plane: XY Note: The reference segment will need to be changed to RPV within the text option. 3. Create Sp3_Sp2_FE planar angle: Define Resulting Signal Name: Sp3_Sp2_FE Calculate a 4 point angle between the following targets:    1 - TARGET::PROCESSED::LV3    2 - TARGET::PROCESSED::LV1    3 - TARGET::PROCESSED::TV7    4 - TARGET::PROCESSED::LV1 Angle Direction: Left Hand Rule 3D Space: Always 0 to 180 degrees Projected onto Plane: XY Note: The reference segment will need to be changed to RPV within the text option. 4. Create Sp2_Sp1_FE planar angle: Define Resulting Signal Name: Sp2_Sp1_FE Calculate a 4 point angle between the following targets:    1 - TARGET::PROCESSED::LV5    2 - TARGET::PROCESSED::LV3    3 - TARGET::PROCESSED::LV1    4 - TARGET::PROCESSED::LV3 Angle Direction: Left Hand Rule 3D Space: Always 0 to 180 degrees Projected onto Plane: XY Note: The reference segment will need to be changed to RPV within the text option. 5. Create Sp1_Pel_FE planar angle: Define Resulting Signal Name: Sp2_Sp1_FE Calculate a 4 point angle between the following targets:    1 - LANDMARK::ORIGINAL::RPV_AX    2 - TARGET::PROCESSED::LV5    3 - TARGET::PROCESSED::LV3    4 - TARGET::PROCESSED::LV5 Angle Direction: Left Hand Rule 3D Space: Always 0 to 180 degrees Projected onto Plane: XY Note: The reference segment will need to be changed to RPV within the text option.

LB Planar Angles

Below defines the orientation (lateral bending) of the adjoining spine segments resolved in the pelvis coordinate system .

Spine LB Definitions

1. Create RSp5_Sp4_LB planar angle: Define Resulting Signal Name: RSp5_Sp4_LB Calculate a 4 point angle between the following targets:    1 - TARGET::PROCESSED::TV7    2 - TARGET::PROCESSED::TV2    3 - TARGET::PROCESSED::CV7    4 - TARGET::PROCESSED::TV2 Angle Direction: Left Hand Rule 3D Space: Always 0 to 180 degrees Projected onto Plane: YZ Note: The reference segment will need to be changed to RPV within the text option. 2. Create LSp5_Sp4_LB planar angle: When defining the left signal, use same definitions except set: Angle Direction: Right Hand Rule 3. Create RSp4_Sp3_LB planar angle: Define Resulting Signal Name: RSp4_Sp3_LB Calculate a 4 point angle between the following targets:    1 - TARGET::PROCESSED::LV1    2 - TARGET::PROCESSED::TV7    3 - TARGET::PROCESSED::TV2    4 - TARGET::PROCESSED::TV7 Angle Direction: Left Hand Rule 3D Space: Always 0 to 180 degrees Projected onto Plane: YZ Note: The reference segment will need to be changed to RPV within the text option. 4. Create LSp4_Sp3_LB planar angle: When defining the left signal, use same definitions except set: Angle Direction: Right Hand Rule 5. Create RSp3_Sp2_LB planar angle: Define Resulting Signal Name: RSp3_Sp2_LB Calculate a 4 point angle between the following targets:    1 - TARGET::PROCESSED::LV3    2 - TARGET::PROCESSED::LV1    3 - TARGET::PROCESSED::TV7    4 - TARGET::PROCESSED::LV1 Angle Direction: Left Hand Rule 3D Space: Always 0 to 180 degrees Projected onto Plane: YZ Note: The reference segment will need to be changed to RPV within the text option. 6. Create LSp3_Sp2_LB planar angle: When defining the left signal, use same definitions except set: Angle Direction: Right Hand Rule 7. Create RSp2_Sp1_LB planar angle: Define Resulting Signal Name: RSp2_Sp1_LB Calculate a 4 point angle between the following targets:    1 - TARGET::PROCESSED::LV5    2 - TARGET::PROCESSED::LV3    3 - TARGET::PROCESSED::LV1    4 - TARGET::PROCESSED::LV3 Angle Direction: Left Hand Rule 3D Space: Always 0 to 180 degrees Projected onto Plane: YZ Note: The reference segment will need to be changed to RPV within the text option. 8. Create LSp2_Sp1_LB planar angle: When defining the left signal, use same definitions except set: Angle Direction: Right Hand Rule 9. Create RSp1_Pel_LB planar angle: Define Resulting Signal Name: RSp2_Sp1_LB Calculate a 4 point angle between the following targets:    1 - LANDMARK::ORIGINAL::RPV_AX    2 - TARGET::PROCESSED::LV5    3 - TARGET::PROCESSED::LV3    4 - TARGET::PROCESSED::LV5 Angle Direction: Left Hand Rule 3D Space: Always 0 to 180 degrees Projected onto Plane: YZ Note: The reference segment will need to be changed to RPV within the text option. 10. Create LSp1_Pel_LB planar angle: When defining the left signal, use same definitions except set: Angle Direction: Right Hand Rule

Shoulder LB

Below defines the orientation of the line between the shoulder targets (LCAJ/RCAJ) relative to the trunk segment.

Shoulder LB & AR Landmarks

1. Create RTA_OR: Click Landmarks button Click Add New Landmark button Create Landmark: RTA_OR    Landmark Name: RTA_OR    Existing Segment: Thorax/Ab Offset Using the Following ML/AP/AXIAL Offsets:    X: 0.0    Y: 0.0    Z: 0.0 Check: Offset by Percent (1.0 = 100%) (Meters when not checked) Do NOT Check: Calibration Only Landmark (Not generated for assigned motion file(s)) 2. Create RTA_ML: Click Landmarks button Click Add New Landmark button Create Landmark: RTA_ML    Landmark Name: RTA_ML    Existing Segment: Thorax/Ab Offset Using the Following ML/AP/AXIAL Offsets:    X: 0.5    Y: 0.0    Z: 0.0 Check: Offset by Percent (1.0 = 100%) (Meters when not checked) Do NOT Check: Calibration Only Landmark (Not generated for assigned motion file(s))

Shoulder LB & AR Definitions

1. Create RSh_Th_LB planar angle: Define Resulting Signal Name: RSh_Th_LB Calculate a 4 point angle between the following targets:    1 - LANDMARK::ORIGINAL::RTA_ML    2 - LANDMARK::ORIGINAL::RTA_OR    3 - TARGET::PROCESSED::LCAJ    4 - TARGET::PROCESSED::RCAJ Angle Direction: Left Hand Rule 3D Space: Always 0 to 180 degrees Projected onto Plane: YZ Note: The reference segment will need to be changed to RTA within the text option. 2. Create LSh_Th_LB planar angle: When defining the left signal, use same definitions except set: Angle Direction: Right Hand Rule 3. Create RSh_Th_AR planar angle: Define Resulting Signal Name: RSh_Th_AR Calculate a 4 point angle between the following targets:    1 - TARGET::PROCESSED::RCAJ    2 - TARGET::PROCESSED::LCAJ    3 - LANDMARK::ORIGINAL::RTA_OR    4 - LANDMARK::ORIGINAL::RTA_ML Angle Direction: Left Hand Rule 3D Space: Always 0 to 180 degrees Projected onto Plane: XZ Note: The reference segment will need to be changed to RTA within the text option. 2. Create LSh_Th_AR planar angle: When defining the left signal, use same definitions except set: Angle Direction: Right Hand Rule

Translation

Below defines the translation of the shoulder targets (LCAJ/RCAJ) in the trunk coordinate system .

Shoulder Translation Definitions
RA_Tho_Transl 1. Define RA_Tho_Transl: Open the Compute Model Based dialog Select TARGET_PATH from drop down list    Data Name: RA_Tho_Transl    Target: RCAJ    Reference Segment: Thorax/Ab    Resoluation Coordinate System: Thorax/Ab 2. Define LA_Tho_Transl: When defining the left signal, use same definitions except set:    Target: LCAJ

Joint Angles

The Tho_Pel and Tho_Lab angles are described here, while the lower extremity joint angles were created based on the segment coordinate systems described here.

Joint Angle Definitions

Thorax Pelvis Angle 1. Define the RTho_Pel_Angle: Open the Compute Model Based dialog Select JOINT_ANGLE from drop down list    Data Name: RTho_Pel_Angle    Segment: Thorax/Ab    Reference Segment: Pelvis    Cardan Sequence: Z-X-Y Use Negative:    X: TRUE    Y: FALSE    Z: TRUE 2. Define LTho_Pel_Angle: When defining the left signal, use same definitions except set: Use Negative:    X: FALSE    Y: TRUE    Z: TRUE Thorax Lab Angle 3. Define the RTho_Lab_Angle: Open the Compute Model Based dialog Select JOINT_ANGLE from drop down list    Data Name: RTho_Lab_Angle    Segment: RThorax/Ab    Reference Segment: VLab    Cardan Sequence: Z-X-Y Use Negative:    X: TRUE    Y: FALSE    Z: TRUE 4. Define LTho_Lab_Angle: When defining the left signal, use same definitions except set: Use Negative:    X: FALSE    Y: TRUE    Z: TRUE Hip Angle 5. Define the RHip_Angle: Open the Compute Model Based dialog Select JOINT_ANGLE from drop down list    Data Name: RHip_Angle    Segment: Right Thigh    Reference Segment: Pelvis    Cardan Sequence: Z-X-Y Use Negative:    X: FALSE    Y: FALSE    Z: FALSE 6. Define LHip_Angle: When defining the left signal, use same definitions except set:    Segment: Left Thigh Use Negative:    X: TRUE    Y: TRUE    Z: FALSE Knee Angle 6. Define the RKnee_Angle: Open the Compute Model Based dialog Select JOINT_ANGLE from drop down list    Data Name: RKnee_Angle    Segment: Right Shank    Reference Segment: Right Thigh    Cardan Sequence: Z-X-Y Use Negative:    X: FALSE    Y: FALSE    Z: TRUE 7. Define LKnee_Angle: When defining the left signal, use same definitions except set:    Segment: Left Shank    Reference Segment: Left Thigh Use Negative:    X: TRUE    Y: TRUE    Z: TRUE Ankle Angle 8. Define the RKnee_Angle: Open the Compute Model Based dialog Select JOINT_ANGLE from drop down list    Data Name: RAnkle_Angle    Segment: Right Virtual Foot    Reference Segment: Right Shank    Cardan Sequence: Z-X-Y Use Negative:    X: FALSE    Y: FALSE    Z: FALSE 9. Define LAnkle_Angle: When defining the left signal, use same definitions except set:    Segment: Left Virtual Foot    Reference Segment: Left Shank Use Negative:    X: TRUE    Y: TRUE    Z: FALSE

IOR Multi-Segment Foot Model

Detailed tutorial focussing on the IOR Multi-Segment Foot model.