Brain Circulation
Mostrando 13-24 de 98 artigos, teses e dissertações.
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13. Oxytocin is a cardiovascular hormone
Oxytocin (OT), a nonapeptide, was the first hormone to have its biological activities established and chemical structure determined. It was believed that OT is released from hypothalamic nerve terminals of the posterior hypophysis into the circulation where it stimulates uterine contractions during parturition, and milk ejection during lactation. However, eq
Brazilian Journal of Medical and Biological Research. Publicado em: 2000-06
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14. Cholesterol homeostasis in human brain: evidence for an age-dependent flux of 24S-hydroxycholesterol from the brain into the circulation.
We have investigated whether side chain-hydroxylated cholesterol species are important for elimination of cholesterol from the brain. Plasma concentrations of 24-hydroxycholesterol (24-OH-Chol) in the internal jugular vein and the brachial artery in healthy volunteers were consistent with a net flux of this steroid from the brain into the circulation, corres
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15. Arterial spasm and slowing of the cerebral circulation in the ischaemia of head injury
Carotid angiograms of 33 patients who had died during 1968 and 1969 from blunt head injury were reviewed and assessed for evidence of arterial spasm and slowing of the cerebral circulation. Spasm was found in 57·5%, a prolonged circulation time in 57·5%, and a combination of both features in 42·4% of cases. In the same group of patients there was also a h
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16. Cerebral blood circulation and brain death.
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17. PROGRESS IN BRAIN RESEARCH Vol. 30: CEREBRAL CIRCULATION
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18. Correlation between angiographic findings and the ischaemia of head injury.
The carotid angiograms of 96 patients who had died from non-missile head injury were reviewed and assessed for evidence of arterial spasm, slowing of the cerebral circulation, and the presence of intracranial haemotoma. As bilateral angiography had been done in 44 cases the results are based on a correlation between the angiographic appearances and the prese
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19. Physiology of the Circulation of the Brain: An Annotated Bibliography, 1938-1948
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20. Brain damage and mortality in dogs following pulsatile and non-pulsatile blood flows in extracorporeal circulation
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21. Late effects of subarachnoid haemorrhage on the response of the primate cerebral circulation to drug-induced changes in arterial blood pressure
The ability of the cerebral circulation to maintain a constant level of cerebral blood flow with halothane-induced hypotension and angiotensin-induced hypertension was found to be impaired one week after subarachnoid haemorrhage in the baboon. No evidence of hypoxic brain damage was found. The clinical significance of these findings is discussed.
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22. Circulating estrogens in a male songbird originate in the brain.
Gonadal steroids act on brain to regulate the development and expression of vertebrate reproductive behavior. In addition, steroid targets in brain are an integral part of the feedback regulation of gonadal steroidogenesis. The actions of androgens in brain are often mediated by enzymatic activation or inactivation of circulating hormone, including local con
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23. Experimental brain death: 1. Morphology and fine structure of the brain
The morphological characteristics of brain death were examined in baboons and cats after artificial cerebral ischaemia. All animals showed autolytic changes in the brain, ischaemic neuronal changes, midbrain haemorrhages, focal necrosis of the brain-stem, demarcation at C 1/C 2 cord segment, and displacement of cerebellar tissue. Ultrastructural examination
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24. Human embryonic somatomedin.
A radioreceptor assay utilizing human fetal brain plasma membrane as matrix and somatomedin A as ligand (fetal brain RRA-SMA) was developed. Increased levels of fetal brain RRA-SMA were found in the fetal circulation. The concentration was approximately 4-fold higher in the fetal as compared to the adult human. At birth, values fell within the adult range. I