NEWS

ggsegFreeSurfer 1.0.1.9000

Added thalamus(), a subcortical atlas of the 26 thalamic nuclei per hemisphere (Iglesias et al. 2018)
Added hippoamyg(), a subcortical atlas of the hippocampal subfields (Iglesias et al. 2015) and amygdala nuclei (Saygin et al. 2017)
Added brainstem(), a subcortical atlas of the four brainstem substructures: midbrain, pons, medulla and superior cerebellar peduncle (Iglesias et al. 2015)
Added hypothalamus(), a subcortical atlas of the five hypothalamic subunits per hemisphere (Billot et al. 2020)
hcpa() is now a focused anterior/posterior hippocampus atlas with 2D slice geometry (left/right × anterior/posterior), regenerated from the fsaverage5 aseg. It previously carried only 3D meshes and could not be plot()ted
The new atlases ship directly in the sf-optional brain_polygons format introduced in 1.0.1, so they render without sf
Subcortical 2D layouts trimmed to their most informative slices (brainstem to 3 views, hcpa to 2, hypothalamus to 4) and the grey anatomical context geometry simplified, for clearer plots and smaller bundled data

Atlas 2D geometry migrated to the sf-optional brain_polygons format (ggseg.formats 0.0.3). The atlases now render without sf and its GDAL/GEOS/PROJ system libraries, enabling wasm and air-gapped installs. Plots are unchanged.

Initial release bundling FreeSurfer atlases from ggsegDKT, ggsegDestrieux, and ggsegDefaultExtra
Includes dkt(), destrieux(), and hcpa() atlas accessors
dkextra() has been removed