The dorsal portion or roof of the midbrain which is composed of two pairs of bumps, the INFERIOR COLLICULI and the SUPERIOR COLLICULI. These four colliculi are also called the quadrigeminal bodies (TECTUM MESENCEPHALI). They are centers for visual sensorimotor integration.

Synonyms: Quadrigeminal Plate, Quadrigemina, Corpora, Mesencephalus, Tectum, Plates, Quadrigeminal, Colliculus Commissures, Superior, Superior Colliculus Commissures, Inferior Colliculus Commissures, Commissure of Superior Colliculus, Inferior Colliculus Commissure, Quadrigeminal Plates, Corpora Quadrigemina, Colliculus Commissure, Superior, Colliculus Commissures, Inferior, Tectum Mesencephalus, Superior Colliculus Commissure, Plate, Quadrigeminal, Tectum Mesencephali, Commissure of Inferior Colliculus, Quadrigemina, Lamina, Colliculus Commissure, Inferior, Lamina Quadrigemina