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.
The brain and spinal cord are made mainly of neural tissue ( consisting of neurones or nerve cells ) and glial tissue ( consisting of supportive and packing cells eg oligodendrocytes [ oligo = just a few ; dendrite = protruding process ; cyto = cell ] therefore a cell with a few dendrites ) , or ependymal cells which produce the CSF ( cerebrospinal ...