脳の三位一体論

脳の三位一体論は、爬虫類的複合体（大脳基底核）、古哺乳類的複合体（大脳辺縁系）、新哺乳類的複合体（大脳新皮質）からなり、それぞれが独立した意識を持ち、進化の過程で前脳に順次追加された構造として捉えられている。

このモデルによれば、大脳基底核は原始的本能を、大脳辺縁系は感情 (情動) を、大脳新皮質は客観的あるいは理性的思考を司る。

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