Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 14 of 14 for “"Cerebral circulation"”.
-
A Study of the Effects of Various Levels of Cranially Applied Electricity on Passage of Glucose from Cerebral Circulation into the Brain
The problem. Electricity, as a controlled energy, has been utilized in many capacities with varying degrees of success. Among these applications is Electroanesthesia (EA). Much is known about the gross effects induced on physiological systems while a subject is experiencing EA, but little is known …
-
ΣΥΜΒΟΛΗ ΣΤΗΝ ΕΡΜΗΝΕΙΑ ΤΗΣ ΝΕΥΡΟΓΕΝΟΥΣ ΡΥΘΜΙΣΗΣ ΤΗΣ ΕΓΚΕΦΑΛΙΚΗΣ ΚΥΚΛΟΦΟΡΙΑΣ
… ROLE OF GAMMA-AMINOBUTYRIC ACID (GABA) ON THE CEREBRAL CIRCULATION, WE USED A PRESSURE MICRO-INJECTION SYSTEM TO SIMULTANEOUSLY ADMINISTER VARIOUS CONCENTRATIONS OF GABA AND MEASURE THE TISSUE PO22 USING AN ADJACENT PO2 MICROELECTRODE. GABA INJECTED DIRECTLY INTO THE MONGOLIAN GERBIL (MERIONES …
-
A dissection and angiographic study of anatomical variations in the anterior communicating artery complex in a South African sample
… of the A1 and A2 segments of the anterior cerebral artery (ACA) and the anterior communicating artery (ACoA). The ACAC is said to be the most frequent site of aneurysms and anterior cerebral circulation variations. Clear correlation between cerebral arterial circulation variations and …
-
Type 1 diabetes mellitus and the brain: influence of clinical complications and genetic factors on brain structure and cognitive function
… Microvascular disease may also affect the cerebral circulation and could potentially compromise brain structure and intellectual performance. Type 1 diabetes commonly develops in childhood before full maturation of the central nervous system and the developing brain may exhibit relative …
-
Fluid and structural modeling of the disease-free and atherosclerotic human carotid bifurcation
… bifurcation, a frequently diseased site of the cerebral circulation. Using ultrasound velocity measurements and magnetic resonance imaging (MRI) data of normal volunteers and patients in vivo, realistic blood velocity profiles and wall anatomy geometries are generated and imported into a …
-
Intracranial Monitoring after Severe Traumatic Brain Injury
… physiological insults. In this thesis, I explore cerebral insults due raised intracranial pressure, decreased cerebral perfusion pressure and impaired cerebral pressure reactivity after traumatic brain injury. In chapter 2, the importance of intracranial pressure, cerebral perfusion pressure and …
-
Intracranial Vascular Findings in a Tri-Ethnic Population – MR Phenotypes and Physiological Parameters
… settings. However, current knowledge of the cerebral circulation still remains limited. Clear evidence of the anatomical differences between distinctive ethnic populations, particularly relating to the morphologic heterogeneity of the intracranial arterial network and the impact of its vari- …
-
Central arterial stiffness is associated with cognitive decline and cardiovascular disease manifestation in cancer survivors in the Framingham Heart Study
… microvascular damage, particularly within the cerebral circulation. Associations between central arterial stiffness and the risks of incident mild cognitive impairment (MCI), CVD diagnosis, and all-cause mortality have been previously established in the general population. However, there is a …
-
Interaction between Adrenergic and Nitric Oxide-releasing Nerves in Cerebral Arteries
… of ischemia so much that interruption of cerebral blood flow by 5 sec can cause syncope, with irreversible tissue damage if the ischemia last a few minutes. In this respect, the body has an imperative duty of ensuring constant and adequate blood supply to the brain. It does so through a …
-
Comparison of patient outcome for aortic valve replacement verses transcatheter aortic valve replacement
… was evaluation of cause and mechanism of the cerebral events. After concluding that the strokes were due to emboli released during mechanical movement during surgery, new technologies have begun to be developed to combat the stroke risk. One device that is used is a deflection device that …
-
Cerebral haemodynamics in man: Clinical and applied observations
… oxygenated blood to function normally. Cerebral oxygen delivery is dynamic, and alters rapidly in response to changes in physiological and pathological stimuli. Interference with cerebral oxygen delivery, either as a result of decreased cerebral blood flow, decreased arterial oxygenation …
-
Hypoxia and vascular nitric oxide bioavailability: Hypoximplications for the pathophysiology of high-altitude illness
… of acute mountain sickness (AMS), high-altitude cerebral oedema (HACE) and high-altitude pulmonary oedema (HAPE), though data to date remains scarce. Therefore, there is a clear need for further work to address the role of NO in the pathogenesis of high-altitude illness.Aims: There were two …
-
Novel Interventions to Improve Cerebral and Peripheral Vascular Function
… blood vessels that supply brain. Impairments to cerebral blood flow (CBF) and cerebrovascular function result in increased risk of cognitive impairment, vascular dementia and stroke. Identifying interventions that can attenuate the age-related decline in CBF and enhance cerebrovascular function …
-
The Measurement and Interpretation of Intracranial Pressure
… lesions, brain swelling, disturbances in CSP circulation and/or its production and reabsorption cycle, choroid plexuses tumours, idiopathic intracranial hypertension, and more diffused intracranial pathological processes. Monitoring and treatment of raised ICP in patients currently focuses on …