SPM will, by default, show you 3 local maxima within each cluster displayed when you click ‘whole brain’ within Results.  To change the default number of local maxima displayed in the output table, edit spm_list.m and replace the variable ‘Num’ (line 201 in the spm_list.m supplied with SPM8). I currently have it set to 64.

You can also edit the variable ‘Dis’ in the same .m file (line 202 in SPM8) to change the minimum distance between peak voxels displayed.

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