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.

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.

Anatomy: Brain
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Article information

rID: 5807
Section: Anatomy
Tag: refs
Synonyms or Alternate Spellings:
  • Tectum
  • Tectal plate

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Cases and figures

  • Figure 1: midbrain (axial) superior colliculi
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  • Figure 2: midbrain (axial) inferior colliculi
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  • Figure 3: midbrain (axial) inferior colliculi
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  • Figure 4: gross pathology brainstem (posterior view)
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