Cannabis October 12, 2016 thcscience_admin Nuclei colliculi superioris are groups of large cells in the middle gray layer of the superior colliculus and more laterally near the midbrain tegmentum.[1] References[edit] ^ Riley HA (1943). An Atlas Of The Basal Ganglia, Brain Stem And Spinal Cord (Based On Myelin-Stained Material). Baltimore: Williams and Wilkins Co. OCLC 4645158. External links[edit] More information at BrainInfo