Do you think mental illness isn’t real? That your friend is “just a little blue”, or the homeless guy talking to himself is just faking it? These are brain activity PET scans from several subjects exhibiting symptoms of four common mental illnesses. Depression…a little blue indeed. About 75% of the higher brain activity, especially that involved with motivation and pleasure, is depressed. And OCD? So much brain activity that a person may want to kill themselves to make it stop.
Psychiatry is real. Neuroscience backs it 100%.
(Source: Mayo Clinic, NIMH)