| The bulky superior cerebellar peduncles cross each other to form the decussation of the superior cerebellar peduncles, located within the midbrain tegmentum. |
| A thin, transversely oriented ribbon of fibers, the medial lemniscus, ascends from the lower brainstem into the midbrain tegmentum where it occupies a ventrolateral position. |
| This decussation occurs in the midbrain tegmentum at the level of the inferior colliculi. |
| Colour of tegmentum and girdle uniform pale ochraceous to yellowish. |
| The tegmentum is formed by the fold of mantle covering the edge of the articulamentum, and extends over the latter from the sides. |
| Two non-sensory control regions were examined, the optic tectum and the mesencephalic tegmentum. |
