Part of the brainstem that covers the posterior surface of the cerebral peduncles and the pons.
The region of the midbrain below and in front of the cerebral aqueduct. It contains the nuclei of several cranial nerves, the reticular formation, and other ascending and descending nerve pathways linking the forebrain and the spinal cord.
A protective layer, like the skin, but specifically referring to a part of the midbrain.