The tectum is considered the dorsal, or roof, part of the midbrain and controls visual and auditory reflexes. The tectum is divided into what is called the corpora quadrigemina, which consists of the two superior and two inferior colliculi. The colliculi are essentially the individual control centers for visual and auditory reflexes respectively. The superior colliculi are located below the thalamus and receive visual sensory input. The inferior colliculi are located below the superior colliculi and are involved with processing auditory stimuli.
Forming the floor of the Midbrain is the tegmentum, which regulates autonomic functions and awareness and controls motor skills. As the ventral part of the midbrain, the tegmentum extends from the substantia to the cerebral aqueduct. The red nucleus is a prominent part of the tegmentum that is involved in motor coordination.
~The Nobel Prize in Physiology or Medicine 1949, Prize motivation: "for his discovery of the functional organization of the interbrain as a coordinator of the activities of the internal organs"~
Midbrain importance: Active Midbrain could link left and right brain and also help children to use many superior functions of the right brain.