TABLE 2

The average infusions per session for the MS15 and MS180 dams

The duration of separation from the pups did not significantly affect cocaine self-administration. There were no significant differences between MS15 and MS180 groups in the mean number of infusions per session (±S.E.M.) for the 14 days of testing.



Session

1
2
3
4
5
6
7
MS15 16.9 (8.1) 25.6 (12.3) 38.0 (12.7) 46.1 (13.3) 47.3 (16.8) 73.0 (27.7) 63.1 (24.9)
MS180 29.9 (12.4) 34.6 (18.1) 29.0 (12.9) 51.1 (14.3) 59.6 (11.5) 60.0 (3.9) 60.6 (9.6)

8
9
10
11
12
13
14
MS15 57.9 (24.3) 57.0 (16.1) 63.6 (15.1) 61.1 (12.5) 63.9 (19.6) 56.9 (21.8) 56.1 (18.3)
MS180
67.7 (10.1)
57.0 (9.6)
65.4 (20.9)
74.1 (19.3)
80.9 (23.6)
86.6 (21.2)
59.9 (15.2)