Electrodes Location Coordinates

This article explains where to find standard electrode location coordinates for your cap in the EEGLAB, and how to create coordinates customized to a specific head circumference.

Materials / Devices / Software

- EEGLAB (EEGPlugin)

- Neuroelectrics headcap

- NIC

- Enobio / Starstim

Pre-requisites

- Access to the EEGPlugin folder.

- Your subject's head circumference measurement.

Step-by-Step Guide

1. Use the standard coordinates

The EEGPlugin folder contains the standard coordinate sets for each cap size.

- Open the EEGPlugin folder.

- Locate the coordinate file matching your cap.

- If you need coordinates customized to a specific circumference instead, go to step 2.

2. Identify customized coordinates

Download the attached Spatial Cap_coords_all.xls

- Select the circumference that best matches your subject.

- Select the corresponding coordinate set from the file.

3. Understand coordinate accuracy before using the data

Location coordinates are derived by scanning the head of one or more subjects and extrapolating the data. This means the values are inherently tied to the specific subject(s) used to generate them, and may vary by source.

- We recommend using these coordinates for visualization rather than data analysis, since values may differ across sources.

- This is a suggestion only, not a strict requirement.

If you have questions about which coordinate set applies to your setup, contact **support@neuroelectrics.com**.

Please include: your cap model and subject head circumference.