View clinical trials related to Physiology.
Filter by:The aim of this study is to estimate tonic vibration latency and whole body vibration reflex latency
Patients with COPD have lower cortical activation and higher cortical inhibitory levels. The purpose of this study is to test the reversibility the lower cortical activation by counterbalancing the increased cortical inhibitory levels with neuro-modulation.
Investigation of the importance of vagal signaling for the glucohomeostatic effects of GLP-1. The study will include physiological studies of truncally vagotomized participants and matched controls.
NO is an ubiquitous molecule contributing to many physiological functions such as vasodilation, immune and oxidative stress responses. NO production can be supplemented either by providing substrate to the NO-synthase (L-Arginine and L-Citruline) or by providing nitrate which can lead to NO. In the present project the investigators evaluate the effect of various acute and chronic oral NO precursors supplementation on exercise performance and responses in healthy young and older subjects.
The study is a combination of outpatient and inpatient monitoring. During the 27-day inpatient portion of the study, the individual's sleep-wake schedule will be varied daily. Volunteers will be randomized to a regular or irregular inpatient schedule.
This study aims to determine the effect of acute hypnotic intake (Zolpidem) on sleep, cognitive and motor performances and on acute mountain sickness symptoms at high altitude. Healthy subjects will be evaluated on 4 occasions (twice at sea level and twice at high altitude), after hypnotic or placebo intake. Following an early wake-up (01:00), symptoms, cognitive and motor performances will be assessed to determine potential residual effects of Zolpidem within such conditions.
Renal parenchymal blood flow can be divided in cortical and medullary blood flow. Changes and factors affecting renal medullary blood flow have not been studied in detail previously as investigators/doctors did not have tools to monitor renal medullary blood flow in vivo. Since Trueta first described renal medullary blood flow, multiple attempts have been made to study renal medullary blood flow using invasive methods. Recently renal medullary blood flow measurement using contrast US has emerged as a promising technique that investigators can use to study renal medullary blood flow in vivo. In this study investigators are aiming to study changes in renal parenchymal (cortical and medullary) blood flow with exercise in healthy subject.
The investigators want to compare the effects of two drugs, levosimendan and milrinone, on cardiac muscle, both in terms of contractility and relaxation. Half of the participants will be randomized to each drug. The effects will be measured through echocardiographic deformation analyses. Since deformation analyses could be dependent on different loading conditions of the heart, a second purpose of the study is to investigate the changes on deformation parameters after applied changes in preload and afterload, but also heart rate.
Few is known on meat protein digestibility in humans and the impact of cooking process, while excessive intake of processed meat has been suggested to increase the risk of colorectal cancer. This study aims to measure in vivo in humans the real digestibility of beef meat proteins depending 2 cooking processes, using ileal tubes and stable isotopes.
The project aims to precisely quantify the postprandial amino acid utilization of egg proteins in vivo in humans, and also to assess their satiating power, in relation with nutrient postprandial waves and incretin secretions. For that purpose, 2 independent studies are conducted. The first one is realized using stable isotopes on 8 volunteers ingesting an egg test meal. The second one is a cross over design performed on 30 volunteers to compare the satiating effect of 2 equivalent snacks: whole eggs or cottage cheese.