| The bulky superior cerebellar peduncles cross each other to form the decussation of the superior cerebellar peduncles, located within the midbrain tegmentum. |
| These four pairs of lemnisci proceed rostrally into the tegmentum of the midbrain. |
| This decussation occurs in the midbrain tegmentum at the level of the inferior colliculi. |
| The periaqueductal gray, dorsolateral pontine tegmentum, and rostroventral medulla are the key regions of the brain involved in this descending pain modulation. |
| Two non-sensory control regions were examined, the optic tectum and the mesencephalic tegmentum. |
| Downregulation of kappa opioid receptor mRNA levels by chronic ethanol and repetitive cocaine in rat ventral tegmentum and nucleus accumbens. |
