xhemi(ndvar, mask=None, hemi='lh', parc=True)¶
Project data from both hemispheres to
Project 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_symmodel is recommended to minimize bias 1.
ndvar (NDVar) – NDVar with SourceSpace dimension.
mask (bool) – Remove sources in “unknown-” labels (default is True unless
ndvarcontains 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
lh (NDVAr) – Data from the left hemisphere on
rh (NDVar) – Data from the right hemisphere on
lower level function for morphing
Only symmetric volume source spaces are currently supported.
Greve D. N., Van der Haegen L., Cai Q., Stufflebeam S., Sabuncu M. R., Fischl B., Brysbaert M. A Surface-based Analysis of Language Lateralization and Cortical Asymmetry. Journal of Cognitive Neuroscience 25(9), 1477-1492, 2013.