Placebos in the brain.
D001921:Brain / Q000000981:diagnostic imaging / Q000503:physiopathology*; D003863:Depression / Q000000981:diagnostic imaging / Q000503:physiopathology* / Q000628:therapy; D006801:Humans; D010300:Parkinson Disease / Q000000981:diagnostic imaging / Q000503:physiopathology* / Q000628:therapy; D015990:Placebo Effect; D014055:Tomography, Emission-Computed