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.
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Showing 1 to 20 of 21 for “"Baroreceptor"”.
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Mathematical relation between baroreceptor neural activity and arterial pressure
Thesis: M.S., Massachusetts Institute of Technology, Department of Electrical Engineering, 1964
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An Analysis of Carotid Sinus Baroreceptor Control of Renin Release
Made available in DSpace on 2014-12-14T13:39:46Z (GMT). No. of bitstreams: 1 8009165.pdf: 9104467 bytes, checksum: 9d4842202a69ab2a319b3eebaf1e02bc (MD5) Previous issue date: 1979
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Overexpression of human Cu/Zn Superoxide Dismutase in Mice; The Effect of Increase Superoxide Scavenging on Autonomic Control of the Heart.
… BP changes in order to measure baroreflex and baroreceptor sensitivity, respectively. In order to identify any alterations in central, efferent, and cardiac components of the baroreflex arc, we electrically stimulated the left ADN and left cervical vagus and compared the reductions in BP and HR …
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ΚΑΡΔΙΑΓΓΕΙΑΚΕΣ ΜΕΤΑΒΟΛΕΣ ΑΠΟ ΤΗΝ ΕΝΑΠΟΘΕΣΗ ΝΟΡΕΠΙΝΕΦΡΙΝΗΣ ΚΑΙ ΚΛΟΝΙΔΙΝΗΣ ΣΤΟΝ ΠΥΡΗΝΑ ΤΗΣ ΜΟΝΗΡΟΥΣ ΔΕΣΜΙΔΑΣ ΤΟΥ ΠΡΟΜΗΚΗ ΜΥΕΛΟΥ ΜΗ ΑΝΑΙΣΘΗΤΟΠΟΙΗΜΕΝΩΝ ΕΠΙΜΥΩΝ ΚΑΙ Η ΕΠΙΔΡΑΣΗ ΤΗΣ ΓΕΝΙΚΗΣ ΑΝΑΙΣΘΗΣΙΑΣ ΣΤΙΣ ΜΕΤΑΒΟΛΕΣ ΑΥΤΕΣ
… IS THE FIRST AND MOST IMPORTANT CENTER OF THE BARORECEPTOR REFLEX AND ONE OF THE LOCI WHERE THE CATECHOLAMINES REGULATE CENTRALLY THE LEVELS OF THE ARTERIAL BLOOD PRESSURE. PREVIOUS RESEARCH ON ANESTHETIZED ANIMALS CONCLUDED THAT LOCAL APPLICATION OF A-ADRENERGIC AGONISTS INTO THE NTS RESULTS …
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Cardiovascular and metabolic control in obese children and adolescents
… ultrasound, pulse wave velocity measurements, baroreceptor sensitivity measurements and exercise tests were performed in order to characterize vascular changes and autonomic control in obese compared to lean children and adolescents. Supplementation with 1,2 g/day of n-3 fatty acids was tested …
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Cocaine- and Amphetamine-Regulated Transcript Peptide Attenuates Baroreflex in the Rat.
… to evaluate the hypothesis that CARTp may alter baroreceptor function in rats. Rats were intravenously administered phenylephrine every 10 min to elicit a baroreflex. CARTp (0.1- 3 nmol) by intracisternal or bilateral intra-NTS microinjection consistently attenuated the phenylephrineinduced …
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Modeled and Unmodeled Approaches for Quantification of the Cardiac Autonomic Nervous System
… the body, such as blood pressure control (the baroreceptor reflex) and arousal. Tracking ANS activity in patients may provide information about traumatic brain injury, heart failure, stroke, diabetes, and sports performance; information that can ultimately aid in clinical decision making. In …
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Tracking autonomic balance using open and closed loop models of the arterial baroreflex
The arterial baroreceptor reflex is the major blood pressure control loop mediated by the autonomic nervous system (ANS). It supports arterial blood pressure homeostasis by dynamically adjusting heart rate, vascular resistance, venous tone, and cardiac contractility. Accurate quantitative models of …
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The role of the ventrolateral medulla in the pressor reflex to static muscular contraction
… were found in 45 of 117 VLM neurons examined in baroreceptor intact and barodenervated cats. Furthermore, 29 of the 45 sympathetic VLM neurons were excited by hindlimb muscular contraction. In another study, 21 of 54 VLM neurons were activated antidromically by stimulation in the spinal cord. …
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Evaluation of pressor sentivity to norepinephrine infusion in dogs with iatrogenic hyperadrenocorticism
… Increased pressor sensitivity or decreased baroreceptor response to norepinephrine was seen in dogs with I-HAC suggesting that this mechanism is involved in the development of hypertension in canine hyperadrenocorticism.
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Do abnormalities in dynamic cerebral auto-regulation underlie the pathophysiological processes behind syncope in older people?
… autonomic function, arterial stiffness, cardiac baroreceptor sensitivity (BRS) were calculated and dynamic cerebral auto-regulation (as the autoregulatory index ARI) assessed before and during tilt. Results: OH: n=85, mean age 73.9±7.1 years; PPH: n= 40, mean age 73.4±7.3 years Baseline: No …
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TIMING RELATIONSHIPS IN HUMAN CORTICAL PROCESSING
… for a longer duration at carotid systole due to baroreceptor induced cortical inhibition. In addition to these primary findings, further post hoc analyses indicated that the alpha cycle and/or the cardiac cycle had an effect on the difference between target and non-target reaction times and the …
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Interoceptive Interventions: Interfacing with Inner States
… Next, I present ReCode, a system which modulates baroreceptor activity and causally influences sympathetic activity (fight or flight response) and has consequential effect on perceived emotion and anxiety ratings. Finally, I present Somnia, a system which stimulates the vestibular system to …
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Investigation Of Whether Sedentary And Physically Active Conditions Lead To Altered Gabaergic Signaling In The Rvlm
… response to GABA may be due the arterial baroreceptors buffering the actions of GABA through the contralateral RVLM. Once we inhibit the contralateral RVLM then we are able to see differences. Since the arterial baroreceptor reflex provides tonic GABAergic input to RVLM, we wanted to know …
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Functional contributions of a sex-specific population of myelinated aortic baroreceptors in rat and their changes following ovariectomy
… we previously identified a distinct myelinated baroreceptor (BR) neuronal phenotype termed Ah-type, which exhibits functional dynamics and ionic currents that are a mix of those observed in barosensory afferents functionally identified as myelinated A-type or unmyelinated C-type. Interestingly, …
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The Baroreflex And Neurogenic Control Of Cerebral Autoregulation In Cerebral Blood Flow
… (BR) have prompted suggestions that the baroreceptors might supply neurogenic input to the cerebral vasculature. Alternative potential inputs have also not been explored. A head up tilt (HUT) protocol offers an established way to investigate CA further. Near-infrared spectroscopy (NIRS) …
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Altered Autonomic Nervous System Function in Chickens Divergently Selected for Body Weight
… parasympathetic nervous system to regulate the baroreceptor reflex. The percentage of adrenal and sympathetic impact on the regulation of heart rate showed that LWS females required greater adrenal activity than the other birds. In Exp. 2, the body weight and food intake responses of HWS and LWS …
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Acute effects of intradialytic nutrition supplementation on hemodynamics, treatment efficiency, and gastrointestinal symptoms in maintenance hemodialysis patients
… cardiovascular function, we found only baseline baroreceptor sensitivity was associated with the change in MAP (r=0.706, p=0.05). In conclusion, we tested the effects of two liquid nutritional supplements on three of the main reasons cited by clinicians to restrict intradialytic nutrition. We …
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Sympathetic neural control of renal blood flow
… I found that large amplitude oscillations in baroreceptor stimulation were required to induce oscillations in RBF and MAP. I speculate on what this may tell us about the nature of the slow oscillation.
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