四叠体（Corpora quadrigemina）是中脑的一个解剖结构。其拉丁文学名的字面意思为“四个双生子形的物体”，形容中脑背面的四个圆形隆起：两侧的下丘（Inferior colliculi，单数Inferior colliculus）和两侧的上丘（Superior colliculi，单数Superior colliculus）。其中，下丘是听觉通路的一部分，上丘主司与视觉相关的眼动功能。上丘与下丘间有密切的连接，主要负责基于视觉和听觉信息的空间定位。

In the brain, the corpora quadrigemina (Latin for "quadruplet bodies") are the four colliculi—two inferior, two superior—located on the tectum of the dorsal aspect of the midbrain. They are respectively named the inferior and superior colliculus.

The corpora quadrigemina are reflex centers involving vision and hearing.