FM: fibromyalgia; HC: healthy controls; HUT: head-up tilt test; PPT: pressure pain threshold.
Figure 1 A-C Pressure Pain thresholds of the finger and shoulder pre- and post-HUT.
Figure 2 A-B Temporal summation on the finger and shoulder pre- and post-HUT for HC, ME/CFS patients without and with fibromyalgia.
Figure 3 A-B Delta windup (stimulus 10 minus stimulus 1) pre- and post-HUT in healthy controls, in ME/CFS patients without fibromyalgia and in ME/CFS patients with fibromyalgia