Figure 1.

Cholinergic basal forebrain regions of interest. Full details of how the subregional cBF map was generated can be found in Kilimann et al. (2014). The regions of interest have been superimposed on the T₁-weighted high-resolution ICBM 2009a Nonlinear Asymmetric MNI152 standard space template available at http://www.bic.mni.mcgill.ca/ServicesAtlases/ICBM152NLin2009. Slices from left to right are coronal slices −8, 3, 6, 9. Red represents the Ch1-2 region of interest corresponding to the medial septum and vertical limb of the diagonal band, green is the nucleus subputaminalis/anterior-lateral NBM and the horizontal limb of the diagonal band (not selected as an region of interest in the current paper), Light blue + dark blue represents the Ch4 region of interest corresponding to the NBM, and dark blue represents the Ch4p region of interest corresponding to the posterior NBM.