A PET Scan can Look at a standard brain (still left) with 1 influenced by Alzheimer's sickness (correct). The lack of purple color with a rise in yellow, blue and green colors shows areas of lowered metabolic exercise in the brain on account of Alzheimer's sickness. “That’s cat discrimination!” objected https://ituneplay.com/view/post/10-Types-of-Coonhound-Breeds/249