Missing electrode locations for BrainProducts Acticap 64

Discussions
1

Hi,
I have data recorded from the following cap:
CapManufacturer": "Brain Products",
"CapManufacturersModelName": "actiCAP slim 64 Ch",
"EEGChannelCount": 64

I am using the default EEG electrode positions from 'channel_BrainProducts_ActiCap_65.mat' and I noted that the locations for AFZ and IZ are not in the template. Is there any way I can obtain these locations?

Is it any way possible to extract the locations from the following info in the EEG set file:

EEG set file
EEG set file915×168 11.1 KB

Thank you!

2

@vidushani thank you for reaching out.

The current default layout for the 64 channel Acticap we have in BST is an old one. Refer forum topics:

  1. Easycap 64 channel location setup - #4 by MarcoBuiatti
  2. Question about electrode positions of a 64-ch EasyCap.

While we work on providing more updated cap layouts, in the mean time you can add these two missing electrodes at your end by doing the following:

  1. Right-click on the channel file > MRI registration > Edit
  2. This will open up the electrodes projected on the head surface with the Edit toolbar at the top (read the tooltips of the buttons in the toolbar for help by hovering the mouse on them).
  3. Click on (iconLabels) to toggle viewing the labels for the electrodes.
  4. Use the (iconScoutNew) to Add a new electrode by clicking on the desired position on the head surface
  5. Use the (iconEdit) to add label/name to this electrode
  6. Click (iconOk) to save the modifications and update the channel file.

How did you obtain this set file ? Unless you have a something very specific you want to do, one easy way would be to just right click on the channel file > File > Export to Matlab to add the contents of the channel file to your workspace and then take it from there.

3

Thank you!