Load the subject head surface.
Type to load. Common choices would be
'head'. We first
then look for
'$SUBJECT*$SOURCE.fif' in the same directory by going
through all files matching the pattern. The head surface will be read
from the first file containing a head surface. Can also be a list
to try multiple strings.
Path to the SUBJECTS_DIR. If None, the path is obtained by using the environment variable SUBJECTS_DIR.
What to do if the surface is found to have topological defects.
'raise' (default) to raise an error,
'warn' to emit a
'ignore' to ignore when one or more defects are found.
Note that a lot of computations in MNE-Python assume the surfaces to be
topologically correct, topological defects may still make other
fail irrespective of this parameter.
New in version 1.0.
The head surface.