Brain tweak makes wimps mighty

摘要

Dominant mice can be humbled and wimps made mighty by altering the strength of electrical connections in their brain. The work may reveal mechanisms that dictate social standing in people. Crucial brain connections directing a mouse's place in the social hierarchy sit in the medial prefrontal cortex. To investigate the mPFC's role in social ranking, Hailan Hu of the Chinese Institute of Neuroscience in Shanghai and colleagues first worked out the hierarchy within a group of mice through challenges between pairs in tubes. When the mice came face to face, the subordinate animal would back out of the tube.