tbr1 mRNA and correlations with social behaviors at 3 months of age. A) qPCR of tbr1 transcript fold-changes in maternally deprived animals; 1-week separated versus control, p = 0.04 and, 1-month separated versus control, p = 0.03. B and C) Adjacent sections near the LCM site stained for cresyl violet, B) and processed for tbr1 mRNA. C) Dotted line indicates the PL. V, ventricle. Bar = 500 μm. D) Correlation between total social behaviors at 3 months and silver grain count (corrected for background) in the PL for the tbr1 probe across all animals. Black filled, diamonds 1-week separated monkeys; gray filled triangles, 1-month separated monkeys; open circles, maternally reared monkeys (r = 0.56, p = 0.045)