"Nucleus ambiguus" is present at
Base of pons
Midbrain, at level of superior colliculus
Midbrain, at level of inferior colliculus
Lateral medulla
The nucleus ambiguus is found in the lateral medulla; it gives rise to the SVE (Special visceral efferent fibers ) components of cranial nerves IX and X. fig:- crossection at the level of medulla(upper pa)
Brainstem, cerebellum and ventricles