Time course of licking responses in PND22 male (A) and female (B) rats in response to an injection of 0.9%, 1%, and 1.1% formalin into the plantar surface of the left hindpaw.

Abstract

<p>Data are presented as mean +/− SE. * <i>p</i><.05; **<i>p</i><.01, against other groups at the same time point.</p