The StatisticSurface pipeline used to rely on the Matlab toolbox SurfStat but was re-written a couple years ago to rely on a pure Python implementation of it called brainStat instead (see #669). The ...
% href="https://brainstat.readthedocs.io/en/master/matlab/API/read_surface_data.html#matlab-read-surface-data">ReadTheDocs</a>.