Typical symptoms of brain stem infarction.

Typical symptoms of brainstem infarction include vertigo, nausea, vomiting, eye movement disorders, binocular crossed paralysis, and even consciousness disorders. Different parts of brainstem infarction will show different syndromes, such as dorsolateral medulla syndrome, which will show vertigo, nausea, vomiting, swallowing difficulties, drinking cough, ataxia, Horner syndrome, and crossed sensory disorders. If the pons also exhibit typical ventrolateral pontine syndrome, ipsilateral abductions, paralysis of the facial nerve, peripheral paralysis, and contralateral hemiplegia and hemiparesthesia; if present at the base of the pons, atresia syndrome results, in which the patient loses all motor functions except for the ability to move the eye up and down; the typical midbrain syndrome is lateral syndrome, which exhibits unilateral oculomotor nerve and contralateral facial tongue, as well as specific crossed paralysis.