Cerebral Blood Flow and Metabolism Measurement
نویسندگان
چکیده
منابع مشابه
Measurement of cerebral blood flow and metabolism in man.
The brain has a high blood flow to meet its high obligatory requirement for glucose as a metabolic fuel. Indeed, glucose requirement and blood flow are directly coupled so that the increased metabolic rate during enhanced functional activity of a particular cortical area is associated with increased blood flow. Here a brief review will be given of the most important methods that can be used for...
متن کاملCerebral Blood Flow Physiology and Metabolism
The brain comprises only 2% of total body weight; however, under normal conditions, it receives 15–20% of the cardiac output and accounts for 20% of total body oxygen consumption. Because energy reserves within the brain are negligible, adequate blood flow is essential for the provision of a continuous supply of energy-producing substrates and for the removal of the byproducts of cellular metab...
متن کامل5 Brain metabolism and cerebral blood flow
Cerebral blood flow is influenced and regulated by a number of factors, including arterial blood pressure, intracranial pressure, venous outflow, blood viscosity, PaCO2 and PaO2, collateral flow, vasoreactivity and the status of cerebral autoregulation. The regulation of vascular resistance lies mainly in the arterioles and precapillary segments (Auer and Loew, 1983). It is important to note th...
متن کاملCerebral blood flow and metabolism during exercise.
During exercise regional cerebral blood flow (rCBF), as blood velocity in major cerebral arteries and also blood flow in the internal carotid artery increase, suggesting an increase in blood flow to a large part of the brain. Such an increase in CBF is independent of the concomitant increase in blood pressure but is modified by the alteration in arterial carbon dioxide tension (PaCO(2)). Also, ...
متن کامل11 Measuring Cerebral Blood Flow and Metabolism
The first well-recognized CBF studies on humans were performed by Kety and Schmidt in the 1940s using nitrous oxide (N2O) gas. The measurement of CBF was based on the principle that the rate of uptake and clearance of an inert diffusible gas is proportional to blood flow. The tissue concentration of the tracer at equilibrium must therefore be dependent on blood flow rather than diffusibility. T...
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ژورنال
عنوان ژورنال: Journal of Neurology, Neurosurgery & Psychiatry
سال: 1986
ISSN: 0022-3050
DOI: 10.1136/jnnp.49.7.848-b