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>> given that it is easy to show >> >the 'significant' areas on the continuous map, the thresholded map has >> >no advantages that I can see. >> >> There may be a cost...It seems to me that you lose some of the anatomic >> context....even if you used a semitransparent display you then decrease the >> clarity of both the statistic and the anatomic underlay. >Point taken, although I think it is rather rare that this makes a big >difference. Also, with the thresholded maps, you usually can't see >anything under the activation. Again, if necessary, you can outline >the underlying anatomy. Why doesn't SPM do an alpha-blend of the structural and functional images? This would allow the underlying anatomy to show through, without much distortion of the functional image (particularly if the functional image's saturation is moderate (around 128-160) ). Lena