What is the biggest characteristic of primary brainstem injury?

Brainstem is a very important structure of the central nervous system. The respiratory circulation center is in the brainstem. There are 12 pairs of cranial nerves and 10 pairs of cranial nerves are connected with the brainstem. When the brainstem is damaged, it will clinically show cross paralysis, that is, ipsilateral cranial nerve damage versus lateral pyramidal tract damage. For example, right brainstem damage may show right facial nerve damage, resulting in right facial paralysis and left limb central paralysis. Show this kind of situation, should clear primary damage etiology, can be cerebral infarction, cerebral hemorrhage, brain tumor. Different etiology, prognosis is different, such as brain stem tumor prognosis is not good. If brain stem infarction or brain stem hemorrhage, should go to the hospital in time, comprehensive treatment, prognosis is still very good.