Items tagged “stroke”

An understanding of brain arterial vascular territories is important in understanding stroke and complications from surgery and endovascular procedures.  Although one could be excused for thinking that within the brain, such a carefully organized organ, blood supply would be constant, the truth...

The middle cerebral artery territory is the most commonly affected territory in a cerebral infarction, due to the size of the territory and the direct flow from the internal carotid artery into the middle cerebral artery, providing the easiest path for thromboembolism. Clinical presentation Th...

Posterior cerebral artery (PCA) infarcts arise, as the name says, from occlusion of the posterior cerebral artery. It is a type of posterior circulation infarction. Epidemiology Posterior cerebral artery strokes are believed to comprise approximately 5-10% of ischemic strokes 6. Clinical pres...

Weber syndrome is a midbrain stroke syndrome that involves the cerebral peduncle and the ipsilateral fascicles of the oculomotor nerve 1-3,5. Occasionally the substantia nigra can also be involved 5.  Clinical presentation ipsilateral CN III palsy diplopia ptosis  afferent pupillary defect ...

The hyperdense MCA sign, also known as Gács sign, refers to focal hyperdensity of the middle cerebral artery (MCA) on non-contrast brain CT and is the direct visualization of thromboembolic material within the lumen. It is thus the earliest visible sign of MCA infarction as it is seen within 90 ...