(L. mound or little hill): C. Superior: Bilateral rounded eminences projecting from the surface of the rostral midbrain tectum associated with the visual system. C. Inferior: Bilateral rounded eminences extending from the surface of the caudal midbrain tectum associated with the auditory system. see Corpora Quadrigemina. C. Facial: Small elevation on the floor of the fourth ventricle medial to the sulcus limitans, produced by the underlying abducent nerve nucleus and the internal genu of the facial nerve.
(a yoke)—Anterior C., the anterior pair of quadrigeminate bodies concerned in the control of the movements of the intrinsic and extrinsic eye muscles. Posterior C., the posterior pair of quadrigeminate bodies concerned in the control of the intrinsic and extrinsic ear muscles and in the transmission of auditory impulses cephalad.
L. diminutive of coffis, hill. A small elevation. Superior and inferior colliculi are elevations on the dorsal surface of the mid-brain.