Fig. 7

Mechanical pain thresholds (MPT) (a) and mechanical pain sensation (MPS) (b) in the CRPS-affected knee (black circles) and in the contralateral control knee (grey circles). Both parameters reflecting pain to punctate stimuli (pinprick) disclosed lower sensitivity in the affected knee, which normalized to the level of the control knee after L4-DRG stimulation. *p < 0.05 vs. contralateral control knee; #p < 0.05 pre vs. post L4-DRG stimulation