Functional MRI

o Spatio-temporal decorrelated activity patterns in functional MRI data

   We present a new method for  separating  multiple task-related events
   from other physiological and physical  events  revealed by functional
   Magnetic Resonance Imaging (fMRI) signals.  The method separates fMRI
   signals into different events by minimizing the  spatial and temporal
   correlations between events.  The  method  was  used  to analyze fMRI
   data sets from subjects performing real or imagery  motor tasks.  The
   method  successfully  separated   task   related   events  (e.g,  the
   activation  in  primary  motor  cortex  during  real  motion  and  in
   supplementary motor area during imagery motion) from unrelated events
   (e.g., an  activation  in  auditory  area  and  slow changes probably
   associated with head drifts).

  ^{Dong D W, Kelso J A S, Steinberg F L 2002}
    {Spatio-temporal decorrelated activity patterns in functional
      MRI data during real and imagined motor tasks}
    {Neurocomputing} { Vol~49(1-4), pp~227-239}

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