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Quadrigeminal plate

Radswiki and Dr Jeremy Jones et al.

The quadrigeminal plate (also known as the tectal plate) is the portion of the midbrain tectum upon which the superior and inferior colliculi sit.

The tectum (Latin: "roof") is the dorsal portion of the midbrain (brainstem) and is derived in embryonic development from the alar plate of the neural tube.