15' 1 0 0

 90-
 Ss-


 S70-

 a60-

 50-

 40-

 S30-

 20-

 10-
 .

 0-


-5- C/NA
-V NC/A-10
-9 NC/A-30
-6 C/A-10
-A- C/A-30


Exp~erimental Day


56


-5- C/NA
-V NC/A-10
-9- NC/A-30
-6 C/A-10
-A- C/A-30


Exp~erimental Day


I I


Figure 3-2. Intruder behavior during daily social defeat sessions. The rats exposed to
 repeated social defeat stress exhibited (A) increases in freezing behavior and
 (B) decreases in exploratory locomotion across the 6 experimental sessions.
 The rats that received only one acute defeat session were stressed at the same
 time as the final stress session for the chronically stressed groups, and so the
 values for these groups are illustrated on day 6. Values expressed are group
 means + SEM (n = 6 rats per group).