Monarch Disease Ontology entry MONDO_0006505 (basal ganglia cerebrovascular disorder) is a pathological condition caused by impaired blood flow in the basal regions of cerebral hemispheres (basal ganglia), such as infarction; hemorrhage; or ischemia in vessels of this brain region including the lateral lenticulostriate arteries. Primary clinical manifestations include involuntary movements (dyskinesias) and muscle weakness (hemiparesis). Also known as: cerebrovascular disorder of collection of basal ganglia, collection of basal ganglia cerebrovascular disorder.