A detailed parcellation atlas of the medial temporal lobe (MTL) regions, including hippocampus and surrounding cortical areas, based on the work of Rosanna Olsen and colleagues.
Format
A list with class 'atlas' containing:
- name
Character string identifying the atlas
- atlas
NeuroVol object containing the parcellation in 1mm MNI space
- labels
Character vector of anatomical region labels
- orig_labels
Full region labels including hemisphere information
- ids
Integer vector of region IDs (1:16)
- hemi
Character vector indicating hemisphere ('left' or 'right')
Source
Bundled `data/olsen_mtl.rda`, attributed to Rosanna Olsen and colleagues. The original atlas publication and redistribution terms have not been verified. Use [get_olsen_mtl()] to attach the available provenance record.
Details
The atlas provides a detailed segmentation of MTL structures in MNI space at 1mm resolution. It includes bilateral parcellation of:
Hippocampal subfields
Perirhinal cortex
Entorhinal cortex
Parahippocampal cortex
Examples
# \donttest{
# Load the atlas data
data(olsen_mtl)
# View available regions
olsen_mtl$labels
#> [1] "Ant_Hipp" "CA1" "CA3_DG" "ERC" "PHC" "Post_Hipp"
#> [7] "PRC" "Sub" "Ant_Hipp" "CA1" "CA3_DG" "ERC"
#> [13] "PHC" "Post_Hipp" "PRC" "Sub"
# Check distribution across hemispheres
table(olsen_mtl$hemi)
#>
#> left right
#> 8 8
# }