View clinical trials related to Healthy Volunteers.
Filter by:The study objective is to evaluate and validate of endogenous markers for the assessment of CYP3A activity in Korean healthy subjects using metabolomics. In part 1, total 75 healthy subjects (males and females) will be enrolled. In part 2, total 25 healthy female subject aged 20-45 years will be enrolled. In both part A and B, subjects will be administered midazolam I.V. 1 mg.
This is an open-label, randomized, multi-center, single dose, two-period, two-sequence crossover study to investigate the bioequivalence of PEG-IFN alfa-2a BA-free formulation versus the reference market formulation (PEG-IFN alfa-2a [Pegasys®]) following subcutaneous administration via prefilled syringe in healthy Chinese participants.
The purpose of this prospective study is to investigate the degree of association between the volume of important pain-relevant structures in the brain and the size of the areas of secondary hyperalgesia.
The purpose of this study is to evaluate the safety and efficacy of Restylane Lidocaine and Restylane Perlane Lidocaine after the first and second treatment when used for facial augmentation in Asian population.
It is well documented that a few days stay in space induces a change in the vestibular-ocular reflex reflecting a reinterpretation of sensory inputs following the disappearance of gravity. If the change of eye reflexes actually the result of a reinterpretation of sensory input, the investigators should also expect to see an alteration of the vestibular-cardiovascular reflexes. The modification of these reflexes may modulate the carotid baroreflex and thus participate in the post-flight cardiovascular deconditioning. The first objective of this project is to study the carotid baroreflex under different supine (dorsal, ventral and lateral) inducing different otolith stimulation in normal-gravity.
The aim of this project is to investigate whether alterations in sensory-motor performances during weightlessness are only of theoretical relevance, or indeed restrict the capacity of the participants. To find out, volunteers will monitor a complex realistic process by operation of buttons and switches in weightlessness. The task will mimic the control of vehicles, research equipment and industrial processes. Effects of weightlessness will be separated from effects induced by stress and those of motivation through evaluation of cortisol and manipulation of motivation.
If investigators know that the anticipatory mechanisms involved in precision grip take into account the gravity, however it is unclear how they adapt to changes in the gravitational level. The objectives of this study are to study and model the movement control and the mechanisms underlying learning and adapting to the condition of weightlessness. Specifically, i) investigators will determine if a change in the level of gravity is taken into account when controlling grip force and ii) investigators will examine the effects of gravity change on hand-eye coordination.
During a space mission the crew has to perform a wide variety of tasks under different acceleration conditions. For handling of displays and control items during a mission, the astronaut's performance is strong depended on an intuitive usability. Currently investigators are exploring and developing different Augmented Reality interfaces for the International Standard Payload Rack (ISPR) Biolab that is installed in the International Space Station (ISS) module Columbus. Augmented reality (AR) is a live, direct or indirect, view of a physical, real-world environment whose elements are augmented by computer-generated sensory input such as sound, video, graphics or GPS data. Using AR technologies provides user-oriented support for working procedures in development, production, and operating of complex technical products and systems. It is conceivable that in future manned missions such interfaces will be applied to space operations, where the astronaut will handle virtual information that enriches the physical reality. To improve the support for the operational ground team and the space crew by performing service and maintenance tasks at the Columbus space laboratory Biolab, investigators explore innovative tridimensional (3D) interaction techniques that allow an intuitive way to interact with the virtual content. The developed AR interfaces for the ISPR Biolab ought to offer support while handling standardize service and maintenance procedures. This research is primarily focused on supporting the ground team during their work at the engineering model of Biolab that is located in Cologne at the Institute of Aerospace Medicine. Applying these interfaces subsequently to space operations requires previous exploration regarding the influence of different acceleration conditions that ought to be considered at the investigators' current stage of designing and development. Thereby one important aspect is focused on the correct placement of virtual user interfaces while interacting with it. To explore human adaption of handling and controlling virtual AR interfaces, this experiment denotes a usability study that will supply findings about human mental workload and sensorimotor coordination while performing the experimentation task under different accelerations of gravity. The proposed experiment will supply essential information about understanding the adequate quality characteristics concerning placement of virtual interfaces in physical reality and identify disturbing factors while applying in hyper-g and micro-g conditions.
In this project, investigators propose to study the jump in different reduced gravity fields obtained during parabolic flights profiles but also during increased gravity fields obtained during turns of the airplane or during the pull-up phase of the parabola. By means of a pneumatic device, an additional pull-down force will be added to the vertical force caused by the gravity field. By combining different levels of gravity to different levels of the added pull-down force it will be possible to dissociate the respective contribution of the otolithic and proprioceptive systems to the anticipatory landing response. To the investigators' knowledge, only one study has modified the gravity field during a jump. However, these authors did not add a pull-down force and only analyzed the vertical ground reaction force. A better knowledge of the sensory-motor control of the landing phase of a jump will also increase the investigators' understanding of the physiopathology of joint instability. Indeed, similarities could be found between the evolution of the motor response due to the absence gravity during long-duration space flights and the pathological process of chronic ankle and knee instability. The knowledge generated by this study will thus provide invaluable information in the context of human performance and rehabilitation.
This is a single center non-interventional study in healthy participants for behavioral assessment and fMRI assessments. The study will consist of 2 parts. Part A will involve 5 participants and will study the implementation of the behavioral tests and identify potential issues. Part B will involve 30 participants and will study the test-retest reliability. Duration of participation for each participant will be 30 days for Part A (28 days screening period and 2 days of study visit) and 48 days for Part B (28 days screening period and 2 study visits of 2 days each separated by a period of 14 days).