The dorsal portion of the human midbrain consists of  

The dorsal portion of the human midbrain consists of corpora quadrigemina. These structures are composed of four rounded elevations, two superior colliculi, and two inferior colliculi. The superior colliculi are involved in visual processing, particularly in coordinating eye movements, while the inferior colliculi are involved in auditory processing, specifically in the integration of auditory information. Together, they play essential roles in sensory processing and reflexive responses.