The midbrain tegmentum houses several important motor centers.  The substantia nigra is one of these centers.  Also a component of the basal ganglia, the substantia nigra produces dopamine which is then transported to the caudate nucleus.  Depletion of these dopamine producing cell results in a movement disorder called Parkinson’s disease.  Another motor center in the midbrain tegmentum is called the red nucleus, and it communicates with motoneurons in the spinal cord.  The midbrain tegmentum also contains several nuclei which form cranial nerves.

The Tegmentum


  Ventricular System


    Spinal Cord