GALR2 and mononeuropathy: Two groups of rats with mononeuropathy received intra-ACC injection of 1 nmol of galanin, followed 5 min later by intra-ACC injection of 1 nmol (n = 8) of the selective galanin receptor 2 antagonist M871, or 1 μl of 0.9% saline as a control (n = 7), the results are shown in Fig. 4.