brainreg-segmentplugin (see User guide).
brainreg-segmentgraphical user interface opens and shows a set of tools.You can then load your brainreg output directory, and follow the main brainreg-segment instructions here for segmenting a 1D track. Setting
Spline pointswill determine how many times along the length of the track that the brain region is sampled at. This can be used to determine the brain region for each recording site on your probe.