Hi Nikki,

Jump to MNI takes a coordinate in MNI space (LPI coordinate system), transforms it to TLRC space and then jumps to that location. So it is meant to show you the equivalent TLRC location of an MNI coordinate. For that to work properly, the underlying volume should be in TLRC space, not MNI. So using volume_mni as your underlay will not work well with Jump to MNI.

At that coordinate, the cross hair is indeed outside the brain for a dataset like TT_N27+tlrc, but whereami indicates that you are in the Right Middle Frontal Gyrus . If you looked at average brain templates like TT_avg152 you will find that location to be inside the brain.

It is important to appreciate the variability in the templates and atlases. The output of whereami was designed to convey this variability. One often looks at the focus point result only, but anything else within a few millimeters is certainly a candidate. I also find it quite instructive to look at the TT_N27_CA_EZ_PMaps dataset from Karl Zilles' Anatomy Toolbox (see whereami -help for details on viewing such datasets) and appreciate the variability of the location of various brain areas.

cheers,
ziad