Localized reduction of blood flow to brain tissue due to arterial obstruction or systemic hypoperfusion. This frequently occurs in conjunction with brain hypoxia (HYPOXIA, BRAIN). Prolonged ischemia is associated with BRAIN INFARCTION.

Synonyms: Brain Ischemia, Ischemia, Brain, Brain Ischemias, Cerebral Ischemia, Ischemic Encephalopathy, Ischemia, Cerebral, Ischemias, Cerebral, Cerebral Ischemias, Encephalopathy, Ischemic, Ischemic Encephalopathies