Cisterna Magna
Mostrando 25-36 de 45 artigos, teses e dissertações.
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25. Hyperglycaemia, a morphine-like effect produced by naloxone in the cat.
In unanaesthetized cats the pronounced hyperglycaemia produced by intravenous morphine (5 mg/kg) was inhibited by naloxone. However, naloxone itself produced hyperglycaemia when given in doses slightly larger than those required to produce inhibition. These two effects of naloxone were obtained when it was injected intravenously, into a lateral cerebral vent
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26. Clearance of bacteria from cerebrospinal fluid to blood in experimental meningitis.
The occurrence and importance of secondary bacteremia in the pathogenesis of and response to therapy in meningitis is uncertain. Streptococcus pneumoniae type III was injected into the cerebrospinal fluid of the cisterna magna in anesthetized, curarized dogs, and sequential simultaneous samples were obtained from the superior sagittal sinus, cisterna magna,
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27. STUDY OF UNCLASSIFIED ACID-FAST BACILLI AND STRAINS OF MYCOBACTERIUM TUBERCULOSIS BY INOCULATION OF THE CISTERNA MAGNA OF GUINEA PIGS
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28. Raised intracranial pressure and cerebral blood flow: I. Cisterna magna infusion in primates
Changes in cerebral blood flow during incremental increases of intracranial pressure produced by infusion of fluid into the cisterna magna were studied in anaesthetized baboons. Cerebral blood flow remained constant at intracranial pressure levels up to approximately 50 mm Hg. At intracranial pressure levels between 50-96 mm Hg a marked increase in cerebral
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29. Cisternal myelography using Conray
Conray-280 (meglumine iothalamate) can be injected safely into the cisterna magna in the human. In this series of 46 patients no complications were encountered attributable to the irritant effects of Conray. Satisfactory radiographic visualization was obtained in 87% of cases using 5 ml. 50% solution of Conray-280 enabling clear delineation of the anterior a
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30. Raised intracranial pressure and cerebral blood flow: 3. Venous outflow tract pressures and vascular resistances in experimental intracranial hypertension
Pressure changes within the venous outflow tract from the brain were studied in anaesthetized baboons. Segmental vascular resistance changes were also calculated and the results correlated with the changes in cerebral blood flow, measured by the 133Xenon clearance method. Three different methods were used to raise intracranial pressure: cisterna magna infusi
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31. Central nervous system site of action for the respiratory depressant effect of diacetylmorphine (heroin) in the cat.
The purpose of our study was to identify central nervous system sites involved in the respiratory depressant effect of drugs that stimulate opioid receptors. Diacetylmorphine (heroin) was administered into several cerebroventricular regions of chloralose-anesthetized cats, while monitoring pulmonary ventilation with a Fleisch pneumotachograph. Administration
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32. Changes of frequency spectrum of the CSF pulse wave caused by supratentorial epidural brain compression.
The frequency spectrum of the CSF pulse wave and amplitude transfer function from arterial to CSF pressure were estimated in the lateral ventricle and cisterna magna during the course of supratentorial epidural compression of brain in anaesthetised ventilated cats. Ventricular fluid pressure, the amplitude of spectral components of the CSF pulse and the ampl
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33. Cerebral circulatory and metabolic effects of hypotension produced by deep halothane anaesthesia
Hypotension to a mean blood pressure of 33 mmHg for periods of 70 to 187 minutes was induced by increasing the inspired halothane concentration in 11 baboons which were already anaesthetized with 0·5% halothane, nitrous oxide, and oxygen. During hypotension, cerebral blood flow, measured by Xenon clearance and by a carotid electromagnetic flowmeter, decreas
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34. Species-specific transfer of plasma albumin from blood into different cerebrospinal fluid compartments in the fetal sheep.
1. The blood-cerebrospinal fluid (CSF) transfer of endogenous sheep albumin and several exogenous species of albumin has been investigated in different CSF compartments of the immature fetal sheep brain, at an early stage of development (60 days gestation, term is 150 days) when the CSF concentration of total protein is high. 2. There were marked differences
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35. A bromodeoxyuridine labelling study of proliferating cells in the brainstem following hypoglossal nerve transection.
The proliferative activity in the hypoglossal nucleus following hypoglossal nerve injury has been studied with the 3H-thymidine analogue, bromodeoxyuridine (BrdUrd). BrdUrd was injected into cisterna magna of the rat brain 2 h prior to killing and subsequently visualised with immunofluorescence. The peak of BrdUrd labelling in the hypoglossal nucleus occurre
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36. Interferon Administered in the Cerebrospinal Space and Its Effect on Rabies in Rabbits
Because combined administration of intramuscular and intravenous interferon has been partially successful in the incubationary treatment of rabies, the effect of direct interferon administration into the cerebrospinal fluid space was tested. After injecting 1,800 U of interferon into the cisterna magna or the lateral ventricle, periodic samples, obtained by