Fig. 2From: The electroacupuncture-induced analgesic effect mediated by 5-HT1, 5-HT3 receptor and muscarinic cholinergic receptors in rat model of collagenase-induced osteoarthritisThe effects of pretreatment of 5-HT1 receptor agonist (8-OH-DPAT, EA+8 ODT, n = 10) and antagonist (spiroxatrine, EA+SPROX, n = 10) in the CIOA rat treated by 2Â Hz EA (EA+DMSO, n = 10) assessed by TFL (a) and PPT (b). Pretreatment with DMSO, 8 ODT, and SPROX was performed 20Â min before 2Â Hz EA. *p < 0.05, **p < 0.01, ***p < 0.001: compared with EA+DMSOBack to article page