Complex sentence: Weber's Syndrome (superior alternating hemiplegia) is characterized by the presence of an oculomotor nerve palsy and contralateral hemiparesis or hemiplegia, and is caused by midbrain infarction as a result of occlusion of the paramedian branches of the basilar artery.
Split into simpler sentences: Weber's Syndrome (superior alternating hemiplegia) is characterized by the presence of an oculomotor nerve palsy and contralateral hemiparesis or hemiplegia. It is caused by midbrain infarction as a result of occlusion of the paramedian branches of the basilar artery.