eelbrain.xhemi¶

eelbrain.
xhemi
(ndvar, mask=None, hemi='lh', parc=True)¶ Project data from both hemispheres to
hemi
of fsaverage_symProject data from both hemispheres to the same hemisphere for interhemisphere comparisons. The fsaverage_sym brain is a symmetric version of fsaverage to facilitate interhemisphere comparisons. It is included with FreeSurfer > 5.1 and can be obtained as described here. For statistical comparisons between hemispheres, use of the symmetric
fsaverage_sym
model is recommended to minimize bias [1].Parameters:  ndvar : NDVar
NDVar with SourceSpace dimension.
 mask : bool
Remove sources in “unknown” labels (default is True unless
ndvar
contains sources with “unknown” label). hemi : ‘lh’  ‘rh’
Hemisphere onto which to morph the data.
 parc : bool  str
Parcellation for target source space; True to use same as in
ndvar
(default).
Returns:  lh : NDVAr
Data from the left hemisphere on
hemi
offsaverage_sym
. rh : NDVar
Data from the right hemisphere on
hemi
offsaverage_sym
.
See also
morph_source_space
 lower level function for morphing
Notes
Only symmetric volume source spaces are currently supported.
References
[1] Greve D. N., Van der Haegen L., Cai Q., Stufflebeam S., Sabuncu M. R., Fischl B., Brysbaert M. A Surfacebased Analysis of Language Lateralization and Cortical Asymmetry. Journal of Cognitive Neuroscience 25(9), 14771492, 2013.