= Single Dipole Scanning =
This process allows for a systematic scanning of sources using performance measures to display single dipoles.  For this tutorial we will use the Generalized Least Squares (GLS) source modeling available in Brainstorm.

<<TableOfContents(2,2)>>

== Computing sources using the GLS ==
 1. Select the protocol ''TutorialCTF''.  Right-click on ''Subject01 / Left / ERF'' > ''Compute sources''.

 1. In this window, you should select ''Expert Mode''.  You will see the following menu.  Select ''[Test] Mosher GLS''.  Click OK.  Use the default settings in the next menu and click OK.

{{attachment:compute_GLS.png||height="450",width="279"}}  --- {{attachment:compute_GLS_options.png||height="593",width="289"}}

 1. Two results were added under the ERF: GLS and GLS-P. <<BR>><<BR>> {{attachment:tree_display_GLSP.png||height="188",width="279"}}
  * '''GLS''':
  * '''GLS-P''':

== Dipole Scanning ==
 1. Drag and drop the GLS-P link into the Process 1 box.  Click ''Run > Sources > Dipole scanning''.

{{attachment:process_box_GLSP.png||height="465",width="300"}} ---   {{attachment:select_process_dipolescanning.png||height="262",width="250"}}

 1. Use the defaults options:
  * '''Time Window''': This is the window over which the scanning will occur. The default option is to use the entire epoch.
  * '''Time between dipoles''': This allows you to change the resolution of the scanning.  To use all time points, enter a 0 (default).

{{attachment:dipole_scanning_options.png||height="250",width="325"}}

 1. The resulting dipole file is added under the Left condition.

{{attachment:tree_display_dipolefile.png||height="200",width="260"}}

 1. Right-click ''ERF|GLSP-dipole-scan > Display on cortex''.  The ''Dipoles'' panel is now open and dipoles are displayed on the cortex.  You can now explore the results using the options in the ''Dipoles'' panel: