Figure 1.

Effect of NPY peripheral administration on rat performances in the Forced Swim Test. Rats were intraperitoneally injected with either vehicle (saline) or NPY (60 μg /kg) for three consecutive days (n = 5 animals/group) between pretest and test sessions. Figure shows latency (A) and duration of immobility (B) (in seconds). Data represent means ± SEM. Asterisks indicate significant differences between groups (*P < 0.05).