Figure 1.

Experimental design. A: The design for a conventional block run (BLOCK) with three acupuncture stimulation periods (S1, S2, and S3) lasting for 8 minutes; B: The design for an verum acupuncture (ACUP) run or sham (SHAM) run totally lasting for 15.0 minutes; C: The design for a resting state (REST) run lasting for 12.5 minutes. The images acquired during the time points labeled by blue-color were used for connectivity analyses.