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"""
Display fMRI Activation
=======================
Load a statistical overlay on the inflated surface.
"""
print __doc__
import os.path as op
from surfer import Brain
"""
Bring up the visualization
"""
brain = Brain("fsaverage", "lh", "inflated")
"""
Get a path to the overlay file.
"""
overlay_file = op.join("example_data", "lh.sig.nii.gz")
"""
Display the overlay on the surface using the defaults
to control thresholding and colorbar saturation.
These can be set through your config file.
"""
brain.add_overlay(overlay_file)
"""
You can then turn the overlay off.
"""
brain.overlays["sig"].remove()
"""
Now add the overlay again, but this time with set threshold
and showing only the positive activations
"""
brain.add_overlay(overlay_file, min=5, max=20, sign="pos")
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