icular needs. If the channel location is stored directly inside the EEG files, add the value &quot;loaded&quot; to this column. </li>
<li><strong>nose_direction (otpional)</strong>: the nose direction. It can be any combination of +/- X/Y/Z (e.g., +Y). This information can generally be found in the README or in the channel_coordinates json files. </li>
<li><strong>channel_system (required)</strong>: The channel system name. It can be any between 10_5, 10_10, 10_20, GSN129, GSN257.</li>
<li><strong>channel_r