Edit activity map

• Edit activity map
  • Required files
  • How to launch
  • Screen
  • Functions

Edit activity map _

This application is a viewer and editor for activities in Cortical activity file(.act.mat). New activity map can be created by integrating multiple activityies.

Required files _

• Cortical model file(.brain.mat)
• Cortical activity file(.act.mat)

How to launch _

• project_mgr : [Tools]->[Edit activity map]
• M-function : vb_job_edit_act(brain_file, act_file)

Screen _

Functions _

1. File menu

   

   Load cortical surface model

   Load VBMEG cortical model file(.brain.mat)

   Load activity map

   Load VBMEG cortical activity file(.act.mat)

   Loaded files

   Display loaded files.

   Close

   Close the window.

2. Activity map list

   It shows activities that the specified cortical activity file(.act.mat) contains.

3. << Replace

   Map one of the activities that you select from the "Activity map list" onto a cortical model.

4. << Maximum

   Calculate largest T-value for each vertex between selected activity data and activity map.

5. << Average

   Calculate mean T-value for each vertex between selected activity data and activity map.

6. Normalize

   Normalise T-values of activity map between 0 to 1.

7. Clear

   Clear data on a cortex model.

8. Undo

   Cancel a previous operation.

9. Store activity map / Delete activity map

   "Store activity map"

   Save an activity map into cortical activity file(.act.mat).

   "Delete activity map"

   Delete selected activity data from cortical activity file(.act.mat).

10. Activity map

    Activity map is shown in the figure.
    [Mouse operations]
    These three operations are supported.

    Select Vertex

    double-click on the cortex, a vertex is selected and a cross-hair cursor appears as below.
    

    Rotate model

    right-drag on the cortex.

    Zoom

    mouse wheel on the cortex.

    
    

11. Color scale

    Set color scale in the [minValue maxValue] order. Activity map will be coloured with the lowest or highest value in the colormap, respectively.
    
    

12. Camera view

    Change camera view by left/right/bottom/top button. Push "Right" button to change the viewpoint to look at the cortical model from right.

13. Print

    Save Activity map as a eps-file(.eps). Press the "Print" button, save file dialog will apppear.

14. Smoothing

    Gaussian

    Gaussian smoothing is applied to activity map.

    Step function

    Step function filter is applied to activity map.

15. Display settings of Hemisphere/Model

    Hemisphere

    checked hemisphere(s) are shown.

    Model type

    Choose Folded model or Inflated model.

    
    
    

16. Selected Vertex information

    Selected vertex number and coodinate value of standard brain is shown.
    Choose one of the coordinate system("Talairach" or "MNI"), coodinate value will be updated.