A neuroscience and psychology term referring to the network of brain regions involved in social cognition and interaction. Also used in the context of collective intelligence or social mind.
See also: ソーシャルブレーン
Research on the social brain elucidates the mechanisms of human empathy and cooperation.
The impact of social media on the social brain is being discussed.
Compound of 社会 (society, social) and 脳 (brain). Likely a calque from English 'social brain', a term used in cognitive neuroscience.