Cerebral Circulation
نویسندگان
چکیده
منابع مشابه
The Cerebral Circulation
This presentation describes structural and functional properties of the cerebral circulation that are unique to the brain, an organ with high metabolic demands, and the need for tight water and ion homeostasis. Autoregulation is pronounced in the brain, with myogenic, metabolic, and neurogenic mechanisms contributing to maintain relatively constant blood flow during both increases and decreases...
متن کاملThe cerebral circulation.
THERE are three principal determinants of blood flow across the brain; the volume and pressure of the arterial supply, the resistance to the flow of blood across the brain, and the resistance to venous outflow. Two paired arteries, the carotids and vertebrals, deliver about 750 ml of blood/min to the brain, or about 12% of the cardiac output. In hypovolaemic states a relatively larger portion o...
متن کاملThalamonal and Cerebral Circulation
Sir,—We read with much interest the fin-: study by Drs Sari, Okuda and Takeshita (Brit. J. Anaesth. (1972) 44, 330) as it relates closely to our own work. As they state, Fitch and his colleagues (1969) reported that fentanyl and droperidol in combination cause a small reduction in intracranial pressure, suggesting that this might be due to a fall in c.b.f. and CMRo,. This led us to study the af...
متن کاملAutoregulation of Cerebral Circulation
Autoregulation of cerebral circulation is the mechanism by which the cerebral blood flow (CBF) is maintained constant between large limits of arterial pressure. Autoregulation appears only between certain pressure limits. The specialized literature presents 2 possible mechanisms of autoregulation: myogenic reaction and metabolic regulation. Sympathetic nervous system stimulation and the antagon...
متن کاملThe cerebral circulation
important in the body because arrest of the circulation for 5 min can cause neuronal death. In order to optimise the delivery of oxygen and metabolic substrates to the brain, anaesthetists need a clear understanding of the anatomy of the cerebral circulation and CSF pathways, the physiology of the cerebral circulation and the effects of anaesthesia, intensive care and other therapeutic interven...
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ژورنال
عنوان ژورنال: Japanese Journal of Medicine
سال: 1963
ISSN: 0021-5120,1881-123X
DOI: 10.2169/internalmedicine1962.2.1