Meningiomas are named according to their location (Fig 1) and cause various symptoms: 1  Convexity meningiomas: grow on the surface of the brain. They may not produce symptoms until they reach a large size. 2  Falx and parasagittal meningiomas: grow from the dura fold that runs between the left and right sides of the brain.
Tectum | Tegmentum | See also. The midbrain, or mesencephalon is made up of two main structures and surrounds the cerebral aqueduct.he midbrain, or mesencephalon is made up of two main structures and surrounds the cerebral aqueduct.
1 In Harry Potter and the Prisoner of Azkaban, the Firebolt's handle is stated to be made of superfine ash. 2  Pottermore, however, lists it as having an ebony handle. 3  It is possible, however, that the person who wrote the advertisement that stated it to be ash was mistaken.