While coordinate tables allow the comparison of results between studies (given they are derived from a suitably standardized space, such as SPM's MNI space or, with some caution, TAL coordinates in BrainVoyager), it is often much easier to grasp the spatial pattern of a distributed network of activation sites if it is displayed in a three-dimensional display.
Surface renderings are one way to accomplish this task. And this page describes the steps necessary to create renderings such as the following:
To use the functions described here, you need
colin_RH_SPH.srffiles bundled with NeuroElf)
% load SRF and VMP objects srf = xff('*.srf'); vmp = xff('*.vmp'); % create SMP (statistical maps sampled at vertex positions) smp = vmp.CreateSMP(srf); % display srf and smp in GUI neuroelf_gui; neuroelf_gui('openfile', srf);
The GUI then allows to interactively rotate and zoom the surface, select maps (if the VMP object contains several maps), change thresholds, etc.
.CreateSMP call also allows to specify additional options, for more information please see the vmp.CreateSMP page.
For the above shown screenshot, the surface has additionally been smoothed:
Or simply check out the video on the right hand side (also available in full size resolution ).