colliculus

n. The word colliculus (plural colliculi) refers to a small elevation (hill) above the surrounding parts of a structure. In the midbrain four elevations known as colliculi are found: two superior colliculi and two inferior colliculi. Superior and inferior colliculi are collectively known as corpora quadrigemina. Superior colliculi are related to visual information and inferior colliculi to auditory information. In humans superior colliculi participate in controlling the eye movements. The inferior colliculi are the principal midbrain nucleus of the auditory pathway.

- AA