Figure 2

Experimental Paradigm. PET-CT scans were performed on the subjects at the PET-CT center of the Sichuan Provincial People’s Hospital. When the migraine attack began, each subject went through the following procedure(Figure 2): (1) examinations of blood sugar, blood pressure and Visual Analogue Scale (VAS) scores (range from 0 to 10) before the PET-CT scan; (2) a 20 min rest in a quiet, dim room; (3) a tracer injection at the back of the right hand (18F-FDG; synthesized with Mini Tracer accelerator; 0.11 mCi/kg dosage); (4) a 40 min rest, which included the 30 min acupuncture treatment in the AG and SAG; (5) a PET-CT scan; and (6) examination of VAS scores after the PET-CT scan (Figure 2). Subjects were instructed to remain relaxed during the whole study, with eyes blindfolded and ears plugged.