Fig. 2From: Effects of anandamide in migraine: data from an animal modelEffect of anandamide (AEA) pre-treatment on nitroglycerin-induced hyperalgesia at the formalin test. Pre-treatment with AEA, 30 min before nitroglycerin (NTG) administration, significantly decreases the total number of flinches/shakes during phase II. *p < 0.05 versus NTG4 h group. Data were expressed as mean ± SDBack to article page