Open-field test in mutant mice with dome-shaped heads (n=2 and 1 for Gad1-Cre, Pax5f/f and Gad1-Cre, Pax5f/+, respectively) and control mice (n=6, Pax5f/f) at postnatal days 40–42. The data are expressed as mean ± SEM. (A) Locomotor activity in the entire arena. (B) Time spent in the center and number of entries into the center. (C) Representative paths of total 60 minutes. *p<0.05, **p<0.01 and ***p<0.001, respectively (Bonferroni post hoc analysis).