Tags: Anatomical Structure, Brain.
The optic tectum or simply tectum is a paired structure that forms a major component of the vertebrate midbrain. In mammals this structure is more commonly called the superior colliculus (Latin upper hill) but even in mammals the adjective tectal is commonly used. The tectum is a layered structure with a number of layers that vary by species. The superficial layers are sensory-related and receive input from the eyes as well as other sensory systems.
