ABSTRACT: Although the human brain makes up only 2 per cent of total body weight, it receives 15 to 20 per cent of cardiac output and accounts for 20 per cent of total body oxygen consumption under normal conditions. Cessation of blood flow results in rapid depletion of energy reserves which can produce ischemic neurological symptoms within seconds. In this paper the authors describe in details the arterial and venous part of the brain circulation as well as the clinical signs and symptoms in the cases with ischemia in them feeding areas.
Praemedicus since 1925. 01/2005; 26:38-45.