Fig 6.

Chronic ethanol exposure (CIE) does not impair normal social investigation patterns. A) Stimulus mice were introduced repeatedly into the home cage of experimental mice in order to test social memory and interaction patterns. Four exposures to the same stimulus mouse (trials 1–4) were followed by presentation of a novel stimulus mouse (trial 5). B) All treatment groups showed normal investigation patterns, which are characterized by a progressive decrease in investigation time with repeated presentation of the initial stimulus mouse. In all groups investigation times increased again in trial 5 upon presentation of the novel stimulus mouse, indicating social recognition memory of the novel mouse.