Brain systems associated with
violations of expectation:
  Contextual uncertainty modulates
activity in a prefrontal-parietal network
Scott A. Huettel1-4, Peter B. Mack1,  Gregory McCarthy1,3-6
Brain Imaging and Analysis Center1
Departments of Psychiatry2, Neurobiology3, Psychology4, and Radiology5,
Duke University Medical Center, Durham, NC
6VA Medical Center, Durham, NC