quadrigeminal plate

The quadrigeminal plate, also known as the tectal plate or tectum, is constituted by the superior and inferior colliculi.

The tectum is the dorsal portion of the midbrain (brainstem), located posteriorly to the mesencephalic aqueduct. It derives from the alar plate of the neural tube during embryonic development.

Masses in the region of the tectum can obstruct the cerebral aqueduct resulting in obstructive hydrocephalus.

History and etymology

Derives from the Latin word "tectum" meaning "roof".


Vascularization is provided by the collicular (or quadrigeminal) artery. It is a branch of the P1 (sometimes P2) segment of PCA.

Related pathology

Siehe auch:
und weiter: