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 22 for “"Myography"”.
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A reconfigurable electrode array for use in rotational electrical impedance myography
… for use in rotational electrical impedance myography (EIM), which is a method for diagnosing neuromuscular disease. The probe can be controlled from a PC via USB and uses an array of small electrode cells that can be connected together into larger electrodes with the help of crosspoint …
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Hardware and software for hand-held electrical impedance myography measurement prototype system
This thesis discusses the need for a more quantitative, objective, and non-invasive method of neuromuscular disease assessment. Currently, the best solution to this problem requires large, bulky pieces of equipment and the time-consuming placement of numerous individual electrodes. In this thesis, …
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Assessment of Electrode Configurations of Electrical Impedance Myography for the Evaluation of Neuromuscular Diseases
<p>Electrical impedance myography (EIM) is a painless, noninvasive approach to measure the neuromuscular disease status. EIM parameters- resistance (R), reactance (X) and phase (θ) depend significantly on subcutaneous fat thickness, muscle size and inter electrode distance. The objective of this …
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Force-Myography Based Estimation of Energy Absorption Capabilities of the Human Arm for Robotic Tele-Rehabilitation Therapy
… human arm are estimated through upper-arm Force-Myography. This approach by itself relaxes stability conditions that affect performance in robotic rehabilitation systems. A new method for estimating energy absorption capabilities is implemented, using recursive least squares. This method allows …
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Impedance Changes in Biceps Brachii Due to Isometric Contractions and Muscle Fatigue Using Electrical Impedance Myography (EIM)
<p>Electrical impedance myography (EIM) is a non-invasive technique used to evaluate neuromuscular conditions by using a quantitative parameter called impedance (Z). It relies upon the application and measurement of high-frequency, low-intensity electrical current imbedded over a localized muscle …
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Investigation of Hydrogen Peroxide/Reactive Oxygen Species-Related Signaling on Vasoactive Responses in Myogenic Resistance Arteries
… of apocynin, ML171 and VAS2870, where pressure myography experiments showed the response of rat cremaster arteries to external hydrogen peroxide, indicating a role for hydrogen peroxide within the vasculature. Pressure myography experiments also showed the arterial response to the different …
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Characterisation of cardiac cellular and vascular function in Ischemic heart disease
… the contractile and distensile properties via myography basedassays.In control murine models it was observed that PVAT presence elicited a pro-contractile effect whensubjected to noradrenaline (NA) dose responses (P = 0.0058, n = 10) compared to PVAT-removedcontrols under the same test …
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Studies of the renin angiotensin system in the human vasculature
… of AII. Preliminary experiments using wire myography were performed in human resistance arteries from normal subjects, obtained by subcutaneous gluteal at biopsy. In these vessels, AI stimulated a contractile repose that was dependent on activation of the AII type 1 receptor (ATIR). Thus, …
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CaV3.2 Channels and BKCa-Mediated Feedback in Vascular Smooth Muscle
… clamp electrophysiology, Ca2+ imaging, pressure myography, immunohistochemistry, quantitative polymerase chain reaction (qPCR) and computational modeling. In initial work, perforated patch electrophysiology was used in concert with Ca2+ imaging to illustrate the coordinated interplay between …
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Pattern classification of terrain during amputee walking
… kinematics from motion capture, and electromyography from 16 sites on the lower limbs for non-amputee subjects and 9 sites or amputee subjects. This work extends previous work [3] by using more conditions, a larger subject group, and more sensors on amputees, and includes non-amputees.I …
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Cellular mechanisms of acute hypoxic pulmonary vasoconstriction in intrapulmonary veins.
… myocytes from intrapulmonary veins. In wire myography experiments, intrapulmonary veins contracted more than sizematched arteries in response to hypoxia and agonists KCl and PGF2α. Venous contractions were inhibited by removal of extracellular Ca2+ or in the presence of Clchannel blocker …
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Investigating The Role Of Transient Receptor Potential Ankyrin One (TRPA1) In Cardiovascular Regulation
… hypertension and associated pathologies. Wire myography using murine TRPAl WT and KO mesenteric arteries showed cinnamaldehyde to cause concentration-dependent vasorelaxation comprising a TRPAl dependent component, which was endothelial independent and mediated by CGRP and hyperpolarisaton. …
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T-type Calcium Channels in Arterial Smooth Muscle: Activity, Regulation and Function
… such as electrophysiology, pressurized myography, intravascular catheterization, polymerase chain reaction, western blotting and computational modeling. Using patch clamp electrophysiology and defined pharmacology, T-type currents were successfully separated from L-type, and further …
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Prenatal Undernutrition, Metyrapone, and the Cerebrovasculature
… and examined using a combination of vessel bath myography and confocal microscopy. In our second study (cohort 2), pregnant female Sprague-Dawley rats were exposed to Metyrapone (±). On postnatal day 9-10, the rats then underwent Hypoxia-Ischemia (±) (unilateral carotid ligation combined with 1.5 …
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Exercise Training Improves Cerebrovascular Oxidative Stress Regulation and Insulin Stimulated Vasodilation in Juvenile and Mature Pigs
… cerebral arteries were dissected for pressure myography experiments. Vascular diameter was tracked continuously and vasomotor responses to insulin (1e-9-1e-6 M) and ET1 (1e-12-1e-7 M) were studied under three conditions: 1) untreated (vehicle); 2) superoxide dismutase (SOD) mimetic (TEMPOL; …
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Relaxin: a new cardiovascular hormone in humans? Comparative potency and mechanisms of action
… human resistance arteries ex vivo using wire myography obtained from gluteal biopsies taken from patients with coronary heart disease (CHD) and normal left ventricular systolic function. We also studied the same effects in larger calibre arteries (internal mammary) and veins (saphenous) using …
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The role of intracellular Ca2+ in the arrhythmogenic activity of pulmonary vein cardiomyocytes
… the pulmonary vein were studied in vitro using myography techniques, where it was shown to display a negative force-frequency relationship, whereby increasing the frequency of electrical stimulation reduced the contractile amplitude. In the presence of noradrenaline, the amplitude of the …
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In hypertension do smaller holes in arterial internal elastic lamina lead to fewer routes for myoendothelial junctions and hence less EDHF response?
… mesenteric arteries was investigated using wire myography, and the involvement of myoendothelial gap junctions (MEGJs) was assessed using the putative gap junction inhibitor carbenoxolone. Carbenoxolone attenuated the EDHF response in the WKY, suggestive of the involvement of myoendothelial gap …
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Vascular Kv7 (KCNQ) Potassium Channels As Therapeutic Targets in Cerebral Vasospasm
… in intact basilar artery segments using pressure myography. XE991 constricted basilar artery segments indicating that Kv7 channels are important determinants of contractile status. In the presence of XE991, spasmogens did not produce additive constrictor responses, suggesting that suppression of …
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Maternal Obesity During Pregnancy: Cardiovascular Outcomes for Mother and Baby
The prevalence of obesity has increased significantly over the last 30 years such that it is now more common worldwide to be overweight or obese than normal weight. As a result of this, increasing numbers of women are entering pregnancy overweight or obese. Obesity during pregnancy is associated …
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