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. Author manuscript; available in PMC: 2014 May 1.
Published in final edited form as: Eur J Pain. 2012 Dec 3;17(5):676–691. doi: 10.1002/j.1532-2149.2012.00245.x

Fig. 2. Withdrawal latencies following injection of DAMGO into the dorsal aspects of the PAG.

Fig. 2

The details are as in Fig. 1. There was significant analgesia in the forepaw at three days of age and increased antinociception in the hindpaw and tail with increasing age. At the highest temperature, only the 3 day old pups showed any analgesia and then only in the forepaw test.