Example - Functional Hip

Example - Functional Hip

Sample files for this tutorial may be downloaded.

1) This tutorial will use the Static.c3d and Functional Hip.c3d files.

2) The Functional Knee.c3d file is used for the Functional Knee Tutorial.

3) FunctionalJoints_Hip_Knee.cmo contains a static trial with both the functional hip and knee defined.

The calculation of functional joints is described here.

Load Static Trial

1. From the Model menu, select Create → Hybrid Model from C3D file.

2. A dialog titled Select the calibration file for the new model will appear;

Select Static.c3d Click Open.

Create Functional Joint

1. On the Landmarks tab:

1. Select the Functional tab

Create Right Functional Joint

1. On the Landmarks tab:

1. Select the Functional tab

2. From the Functional Joint Name box, select F_RHIP.

3. Click Create.

2. Select tracking targets for the F_RHIP:

   Tracking Segment/Targets
   Select Use Tracking Targets (ctrl-click to multi select)
     LASI, LPSI, RASI, RPSI

   Other Segment/Targets:
   Select Use Other Targets (ctrl-click to multi select)
     RTHI1, RTHI2, RTHI3, RTHI4

Click on Close Tab before proceeding.

Create Left Functional Joint

1. On the Landmarks tab:

1. Select the Functional tab

2. From the Functional Joint Name box, select F_LHIP.

3. Click Create.

2. Select tracking targets for the F_LHIP:

Click on Close Tab before proceeding.

Model Builder Advanced Post Processing

1. Select the Post Processing button from the menu (image below)

2. Select the Functional Joints tab from the dialog box (image on right)

3. Open functional movement file:

1. Select the Add Motion File From Disk

2. Browse to functional movement file, select Functional Hip.c3d

3. Click Open

4. Select the motion file by clicking on the trial, this will highlight the trial in blue.

NOTE: Once the trial has been selected, the name of the trial will be highlighted and the movement file will appear in 3D viewer.

Define F_RHIP Start and End of motion

1. Select the START frame of the right functional movement

1. Select F_RHIP, this will highlight the joint in blue

2. Using the slider (seen below), select the START frame of the right functional movement. Set the Start Frame to 399

3. Click Set START Event to Current Frame

2. Select the END frame of the right functional movement

1. Select F_RHIP, this will highlight the joint in blue

2. Using the slider (seen below), select the END frame of the right functional movement. Set the End Frame to 1183

3. Click Set END Event to Current Frame

Define F_LHIP Start and End of motion

1. Select the START frame of the left functional movement

1. Select F_LHIP, this will highlight the joint in blue

2. Using the slider, select the START frame of the left functional movement. Set the Start Frame to 1760

3. Click Set START Event to Current Frame

2. Select the END frame of the left functional movement

1. Select F_LHIP, this will highlight the joint in blue

2. Using the slider, select the END frame of the left functional movement. Set the End Frame to 2653

3. Click Set END Event to Current Frame

Compute Landmarks

1. Select Compute ALL Landmarks
2. Close the Model Builder Advanced Post Processing dialog box
3. The F_RHIP and F_LHIP landmarks should appear in purple in the 3D viewer

If the landmarks do NOT appear in the 3D viewer, check:
- That the landmarks are turned on (3D View Options)
- Check that all steps in this tutorial were completed

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