An anonymous reader wrote to mention a ScienceDaily article about the social status effects of bullying on mice and men
. From the article: "The results reveal neural mechanisms by which social learning is shaped by psychosocial experience and how antidepressants act in this particular brain circuit. They also suggest new strategies for treating mood disorders such as depression, social phobia and post-traumatic stress disorder, in which social withdrawal is a prominent symptom ... He and his colleagues also discovered that social defeat triggered an upheaval in gene expression in the target area of the circuit, the nucleus accumbens, located deep in the front part of the brain -- 309 genes increased in expression while 17 decreased."