"Red nucleus" is present at
Base of pons
Midbrain, at level of superior colliculus
Midbrain, at level of inferior colliculus
Medial medulla
The red nucleus is diagnostic of midbrain division at the level of the superior colliculus; it lies between the occulomotor nucleus (CN III) and the substantia nigra. fig:- crossection at the level of Superior colliculus Midbrain
Brainstem, cerebellum and ventricles