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Healthy Volunteers clinical trials

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NCT ID: NCT01143506 Withdrawn - Healthy Volunteers Clinical Trials

Physiology of Volition Studied With Nerve Block

Start date: June 1, 2010
Phase: N/A
Study type: Observational

Background: - The experience of volition that accompanies voluntary movement can be divided into the sense of will, or deciding to move, and the sense of agency, or feeling that the movement just made was self-generated. Very little is known regarding the neurological origin of this sense of volition. Previous research has shown that a particular part of the brain, the parietal lobe, is involved in our inner sense that we control the movements we make. Researchers are interested in determining if this sense relies on sensory information from moving fingers reaching the parietal lobe. Objectives: - To determine the brain regions responsible for the sense of volition and the associated sense of agency. Eligibility: - Healthy right-handed individuals between 18 and 55 years of age. Design: - The study will involve a screening visit and two testing visits. The screening visit will last 30 minutes to 1 hour, and the testing visits will each last 3 to 4 hours. - Participants will be screened with a physical examination and medical history. - At each testing visit, participants will have a brain magnetic resonance imaging (MRI) scan, electroencephalography (EEG), and electromyography (EMG). The MRI scan and EEG will be done during a movement task that involves the thumb, second finger, and fifth finger of one hand. EMG will be used to monitor movements and muscle activity. - During the second testing visit, participants will receive a nerve block using anesthetic, followed by the MRI, EEG, EMG and movement task. The nerve block will temporarily numb and prevent the movement of parts of the hand and fingers. - After the MRI scan and EEG recording, participants will be asked to rate how much control they felt they had over choosing whether to move, and how much control they felt they had in actually making the movements.

NCT ID: NCT01039909 Withdrawn - Healthy Volunteer Clinical Trials

A Clinical Study to Assess the Effects of SRT2104 Upon Immobilization-Induced Skeletal Muscle Atrophy in Healthy Human Volunteers

Start date: January 2011
Phase: Phase 1
Study type: Interventional

The main purpose of this study is to investigate the effect of SRT2104 upon energy production in muscle (specifically the maximum amount of energy produced with muscle contraction), how much sugar and fat are stored in the muscle, and the size of the muscle after receiving 2.0 g of SRT2104 or placebo given in capsule form once a day for 28 days including a 14 day knee and lower leg immobilisation period during the final 14 days of dosing. Imaging methods, muscle biopsies and exercise tests will be used in the study to see whether the following measurements change after taking SRT2104 for 28 days, including an immobilised knee and lower leg for the final 14 days of dosing. i) energy reaching the muscles ii) muscle strength iii) changes in the structure of the muscle This study will also investigate the pharmacokinetics, safety and tolerability of 2.0 g of SRT2104 administered orally once daily for 28 consecutive days. The investigation of pharmacokinetics of SRT2104 allows us to gather information regarding: i) how long it takes for the drug to be absorbed and detected in the blood ii) how much we can detect iii) how long we can detect it for iv) how often we need to give the drug to maintain a steady amount in the blood. SRT2104 will be given to healthy subjects aged between 18 and 40 years old. Subjects will participate in this single centre study for approximately 79 days. The study consists of 11 outpatient clinic visits and 4 telephone calls (including a prescreen call to determine whether subjects are interested in participating).

NCT ID: NCT01017926 Withdrawn - Healthy Volunteers Clinical Trials

Triazolam Trial In Healthy Subjects To Compare Bioavailability Between Formulations Of Triazolam To Determine Their Bioequivalence In Terms Of Rate And Magnitude Of Absorption

Start date: August 2010
Phase: Phase 1
Study type: Interventional

The purpose of this study is to compare the bioavailability of two oral formulations of Triazolam in healthy volunteers, in order to determine that they are bioequivalent.

NCT ID: NCT00345462 Withdrawn - Healthy Volunteers Clinical Trials

Annual Study to Investigate Inactivated Virosomal Influenza Vaccine for the 2006/2007 Influenza Season in Europe.

Start date: June 2006
Phase: Phase 3
Study type: Interventional

Influenza (flu) viruses change continuously, therefore also the parts of viruses used in influenza vaccines can vary from year to year. In Europe, manufacturers/marketing holders of these vaccines are required to be involved in ongoing clinical trials and to present the results to the competent authorities each year. The current study is a phase IIIa clinical trial with a commercially available virosomal vaccine (Invivac®) supplied in pre filled syringes. It is part of the ongoing clinical trial program for Invivac® and will be done to assess the immunogenicity and safety and tolerability of next season's trivalent influenza virosomal vaccine in two groups of healthy subjects: subjects aged >= 18 and <= 60 years and subjects >= 61 years of age (elderly).

NCT ID: NCT00180765 Withdrawn - Healthy Volunteers Clinical Trials

Regulation of the Release of Inflammatory Mediators From Blood Leukocytes

Start date: October 2001
Phase:
Study type: Observational

Chronic obstructive pulmonary disease (COPD for short) involves inflammation inside the air passages of the lungs. This inflammation might be partly responsible for the shortness of breath, cough and susceptibility to chest infections that form part of COPD. Inflammation is caused, in part, by white blood cells that are attracted from the blood into the air passages. Once inside the air passages, the white blood cells may change (or 'differentiate') and release substances that produce inflammation and attract more white cells. The hypothesis is that the lifespan of these cells may also be prolonged such that they produce more inflammatory mediators and in turn perpetuate inflammation. The cycle of inflammation may damage the lungs, so we want to see what mediators are released by white blood cells and determine if we can inhibit this effect with existing and new drugs. We would also like to see the effect of these drugs on the life-span and function of white blood cells. We will compare the behaviour and characteristics of white cells with those from healthy smokers and healthy non-smokers to find out if there is anything different about cells from COPD patients.