"Nucleus ambiguus" is present at
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)
Base of pons
Midbrain, at level of superior colliculus
Midbrain, at level of inferior colliculus
Lateral medulla
Brainstem, cerebellum and ventricles