In the brain, the corpora quadrigemina (Latin for "quadruplet bodies") are the four colliculi—two inferior, two superior—located on the posterior aspect of the midbrain.
| Mesencephalon (midbrain)
cerebral peduncle: midbrain tegmentum (periaqueductal gray, ventral tegmentum, nucleus raphe dorsalis), pretectum, substantia nigra, red nucleus, pedunculopontine nucleus, medial longitudinal fasciculus, medial lemniscus, rubrospinal tract, lateral lemniscus
tectum: corpora quadrigemina, inferior colliculi, superior colliculi
cerebral aqueduct: oculomotor nucleus, trochlear nucleus, Edinger-Westphal nucleus
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