|Brain: Midbrain tegmentum|
|Transverse section of mid-brain at level of superior colliculi. ("Tegmentum" visible center right.)|
|Section through superior colliculus showing path of oculomotor nerve. (Tegmentum not labeled, but surrounding structures more clearly defined.)|
|Gray's||subject #188 802|
The midbrain tegmentum is the part of the midbrain extending from the substantia nigra to the cerebral aqueduct in a horizontal section of the midbrain. It forms the floor of the midbrain which surrounds the cerebral aqueduct.