SPM’95 Processing Steps - Overview1) Spatial Coregistration: smoothing

SPM’95 Processing Steps - Overview1) Spatial Coregistration: smoothing

• Increases relative signal to noise
  • neurophysiological effects of interest extend over several millimeters whereas high frequency noise has a much smaller spatial extent and so is relatively reduced by smoothing.
• Conditions the data to conform more closely to a Gaussian field model.
• Minimize effects of inter-subject anatomical differences.