Your brain on depression~ PET scan shows hot spots of increased activity in the brain of a non-depressed person. (Depression is not a sign of weakness or negative personality. It is a major health problem and a treatable medical condition)
Study: "Those taking curcumin also had mild improvements in mood, and their brain PET scans showed significantly less amyloid and tau signals in the amygdala and hypothalamus than those who took placebos."
A beautiful animation explaining how a PET scan works
PET Scans May Help Image Multiple Sclerosis-Related Damage
Study to Examine Amyloid PET Scans as Diagnostic Tool for Alzheimer’s | Psychiatric News