Upper Left images shows rCBF distribution in a group of 12 Normal
controls during rest (base line). Note the normal hyperfrontal flow pattern.
                 

Right image shows rCBF distribution in the same group studied 2
hours after base line study.

Below is a statistical analysis (Students) of the difference between the two
studies. No significant difference are seen between the two studies.

Image courtesy: Siegbert Warkentin, Ass.Prof., Director of
CBF-laboratory, Neuropsychiatric Clinic and Dept.of Clinical
Physiology,University hospital MAS, Malmö, Sweden