FIGURE 5. Metabolic comparison between aged monkeys and humans. Images represent 3-dimensional SSP of mean pixel values of normalized cerebral metabolic rate of glucose (Norm CMRglc) across 5 aged healthy humans (top row) and 5 aged monkeys (middle row) in left lateral (LT.LAT), left medial (LT.MED), superior (SUP), and inferior (INF) aspects of brain. Bottom row represents actual size of rhesus monkey brain compared with human brain. Images in middle row are magnified (x2.25) for better clarity.