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. 2015 Mar 25;10(3):e0122924. doi: 10.1371/journal.pone.0122924

Fig 2. The sex differences effects of opioid receptor agonist and antagonist on mechanical sensitivity.

Fig 2

Effects of injection in the masseter tendon with DAMGO or PBS on mechanical sensitivity 14 days after tendon ligation in male (2A), female (2B) and GDX male rats (2C). The effects of opioid receptor antagonist were showed in Fig 2D. All data are shown as mean ± SE and each group consisted of 6 animals. * denotes significant effects with respect to the pre-treatment condition at p < 0.05.