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. Author manuscript; available in PMC: 2008 Sep 4.
Published in final edited form as: Behav Brain Res. 2007 Feb 20;182(2):180–192. doi: 10.1016/j.bbr.2007.02.016

Figure 6.

Figure 6

Mean rates of ultrasonic vocalization (USV/3min) of rat pups in response to dams. On the left, the pup was isolated in the novel test chamber for the first 3 min and then the dam was placed next to the pup for the last 3 min. On the right, the pup was with the dam for the first 3min and then separated from her during the last 3 min. The silhouettes of pup and dam at the top of each graph depict the changing conditions. Asterisks mark significant differences from the 1st isolation [41]. Figure redrawn. Reprinted by permission of Developmental Psychobiology.