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 13 of 13 for “"peristalsis"”.
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BIOENGINEERING CHITOSAN-BASED TUBULAR NEURO-MUSCULAR GASTROINTESTINAL TISSUE
… The GI tract performs 2 main functions: (1) peristalsis; a coordinated rhythmic contraction and relaxation that ensures propulsion of the ingested food along the tract and (2) absorption of nutrients through the epithelium of the tract. The GI tract is a highly complex organ system with …
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Familiar Food-Induced Feeding Activation in C. Elegans
… muscle motions, pharyngeal pumping and isthmus peristalsis, and the frequencies of the two feeding motions dramatically increase in response to food as in other organisms. I attempted to understand the mechanism underlying food-induced feeding activation by studying the mechanism and the …
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Deformable Registration of Supine and Prone Colons for CT Colonography
… of the human colon. The colon's deformation by peristalsis and the diverse shapes of polyps make it difficult to distinguish polyps from other non-threatening entities in the colon. Hence, most CTC protocols acquire both prone and supine images to improve the visualization of the lumen wall, …
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RoSE Enhancement for In Vitro Simulations of Human Swallowing
… of the dynamic forces involved in the esophageal peristalsis. The RoSE (Robotic Soft Esophagus) addresses this gap by combining the fields of material sciences, actuation, and control technologies. The RoSE is an open loop, pneumatically controlled, compliant, and continuous soft robotic actuator …
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Neuronal plasticity in the enteric nervous system motor pathways
… using hexamethonium or mecamylamine inhibited peristalsis. 6 out of 20 preparations showed almost full recovery with electrical stimulation at the oral end in the presence of hexamethonium. Peristalsis also showed some recovery when electrical stimuli were applied in the presence of muscarinic …
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Using RNA sequencing to identify transcriptomic differences in the renal pelvis
… cells are required to initiate and maintain peristalsis; however, the precise mechanisms that underlie pacemaker function remain undetermined. By studying gene expression of pacemaker cells, our goal is to gain further insight as to the workings of this tissue. Since genetic studies of the …
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Risk and pathogenesis of dysphagia related to antireflux surgery
… period, with global failure of primary peristalsis in 70% of patients after total fundoplication, compared with 20% of patients after cholecystectomy. Oesophageal ileus is transient with subsequent return of preoperative motility patterns (Chapter 2). Of all patients undergoing …
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Design, analysis and trajectory tracking control of underactuated mobile capsule robots.
… endoscope - which moves with the aid of visceral peristalsis - in the GI (gastro-intestinal) tract can be improved by adding propulsion to it e.g. legged, magnetic or capsubot-type propulsion. Driven by the above needs this thesis presents the design, analysis, trajectory tracking control and …
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Nuove osservazioni sulla biomeccanica dell’uretere umano
… from the kidney to the urinary bladder. Ureteral peristalsis, the principal motor event that propels urine along the ureter, is the result of coordinated contractions of longitudinal and circular smooth muscle inside the organ wall. Alterations of static and dynamic biomechanical properties of the …
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Molecular mechanisms of strain-stimulated intestinal epithelial cell differentiation and migration
… deformation during normal gut function by peristalsis and villous motility. In vitro, cyclic strain promotes intestinal epithelial proliferation and induces an absorptive phenotype characterized by increased dipeptidyl dipeptidase (DPPIV) expression. Schlafen 3 is a novel gene recently …
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The Biology of a Colonial Hydroid
… several hours. The most striking feature of the peristalsis is that it is synchronized throughout a colony, in that the waves begin at the tip of each hydranth simultaneously. The time-lapse movies have also elucidated a series of rhythmic movements which occur during the reconstitution of …
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Spatiotemporal mapping of spontaneous smooth muscle motility in capacious organs : the ex vivo urinary bladder and in vivo gravid uterus of the rabbit : a thesis submitted in partial fulfilment of the requirements for the degree of Doctor of Philosophy at Massey University, Palmerston North, New Zealand
… rather than direct propulsion of the foetus by peristalsis. The latter effects were reversed by the β2 adrenergic receptor agonist salbutamol thus reducing area of contraction, duration, and distance of propagation. The characteristics of smooth muscle contraction that are associated with the …
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Wirkung des Benzodiazepins Midazolam auf die Dünndarmperistaltik des Meerschweinchens in vitro
H. Wenderoth, M.K. Herbert, N. Roewer Klinik für Anaesthesiologie, Universität Würzburg, D-97080 Würzburg, Deutschland Ziel der Untersuchung: Benzodiazepine, wie z. B. das Midazolam, werden sehr oft zur Sedierung von Patienten auf Intensivstationen genutzt. Die Hemmung der gastrointestinalen …