One-way ANOVA of plasma prolactin levels revealed a significant main effect of foot shock stress [F(3,27) = 4.48, p<0.05] (Table 2). Newman-Keuls post hoc tests showed that the prolactin level in the H-RI rats 45 min after foot shock was significantly higher than that in either the stress control rats (p<0.01) or the L-RI rats (p<0.05).
