284 Clinical Trials for Various Conditions
The purpose of this trial is to study the brain response using functional MRI (fMRI) before and after varying doses of insulin given through the nose. The magnetic resonance imaging uses a very strong magnet to produce images of participant's brain. It becomes a functional MRI when the study team looks at the activity within the brain (blood flow / change in metabolism).
The purpose of this study is to develop a technique called real time fMRI neurofeedback. This technique uses a regular MRI scanner, except that special software allows the researchers to measure activity in participants brain, using fMRI, and then give information, in the form of a feedback signal, which indicates brain activity in real time, while in the MRI scanner. The larger goal of this study is to develop ways to help people, including those with depression, better regulate brain activity. The researchers think that this may be helpful in managing psychiatric symptoms. This study design has three phases, however, only two phases (phase 2 and 3) are considered to be a clinical trial. Phase 2 (part 2) was registered and is NCT05934604. This is the phase 3 (part 3) for this project and is funded by the National Institutes of Health.
The purpose of this study is to develop a technique called real time fMRI neurofeedback. This technique uses a functional MRI scanner, except that special software allows the researchers to measure activity in participants brain, using fMRI, and then give information, in the form of a feedback signal, which indicates brain activity in real time, while in the MRI scanner. The larger goal of this study is to develop ways to help people, including those with depression, better regulate brain activity. The researchers think that this may be helpful in managing psychiatric symptoms. This study design has three phases, however, only two phases (phase 2 and 3) are considered to be a clinical trial. Therefore, this registration will include phase 2 at this time.
This project will study the feasibility of motor rehabilitation in people with cerebellar ataxia using real-time functional magnetic resonance imaging neurofeedback (rt-fMRI NF) in conjunction with motor imagery. To do so, data will be collected from healthy adults in this protocol, to be compared with data from cerebellar ataxia participants.
The goal is to characterize vascular reactivity and cardiac pulsatility of normal appearing white matter in patients with CCM during hypercarbia/hypocarbia using quantitative real-time high-speed multi-echo fMRI to develop prognostic biomarkers for CCM formation
The investigators will acquire simultaneous EEG and fMRI data from Veterans with depression and schizophrenia and mentally healthy Veterans to assess early sensory responses, context updating, and responses to emotional images. Understanding how rumination affects engagement with the environment is the first step towards assessing its far-reaching cognitive and emotional costs, which cut across traditional diagnostic boundaries. Understanding how mindfulness restores information processing will increase our understanding of how, and for whom, it works.
The purpose of this study is to test the accuracy of using an imaging technique called breath-holding functional magnetic resonance imaging (BH fMRI) in addition to the standard imaging test described above. This study will allow the researchers to find out whether using BH fMRI in combination with the standard approach is the same as, better, or worse than the standard approach used alone.
Functional magnetic resonance imaging (fMRI) is a non-invasive test used to detect changes in brain activity by taking picture of changes in blood flow. The imaging helps doctors better understand how the brain works. Task based fMRI (TB fMRI) prompts patients to perform different activities (e.g. word selection in a reading task), and is routinely performed on patients in preparation for a Neurological surgery (surgery that involves the nervous system, brain and/or spinal cord). The purpose is to locate areas of the brain that control speech and movement; these images will help make decisions about patient surgeries. However, there are however gaps in knowledge specific to the language areas of the brain, especially for non-English patients and bilingual patients (those who are fluent in more than one language). This study proposes to evaluate if resting state fMRI (RS fMRI) that does not require any tasks, along with a novel way to analyze these images using "graphy theory," may provide more information. Graph theory is a new mathematical method to analyze the fMRI data. The overall goal is to determine if graph theory analysis on RS fMRI may reduce differences in health care treatment and outcomes for non-English speaking and bilingual patients. We hope that the results of this study will allow doctors to perform pre-operative fMRI in patients who do not speak English.
The purpose of Project 2 is to execute phase I functional magnetic resonance imaging (fMRI) studies to assess the effects of lorcaserin on brain target engagement (measured by fMRI brain activation and neural connectivity) in cocaine use disorder (CocUD) subjects and/or opioid use disorder.
The investigators hope to gain a better understanding of the influence of affect reactivity and regulation on the decision of newly diagnosed breast cancer patients to choose bilateral mastectomy. The information gained can help develop an intervention to enable management of cancer-related anxiety by non-surgical means.
The objective of this research is to identify the functional neural mechanisms (as assessed using fMRI) of short-term N-acetylcysteine (NAC) administration among methadone-maintained individuals with cocaine dependence.
Background: An electroencephalogram (EEG) measures the brain s electrical activity. EEG shows that the louder the sound needed to wake a person, the deeper the person s sleep. Researchers are using functional magnetic resonance imaging (fMRI) to study people during sleep so they can view brain activity in 3D. But they still need to correlate fMRI with sound thresholds, like the EEG. Objective: To measure brain activity during sleep using fMRI and EEG. Eligibility: Healthy people ages 18 34 who can sleep on their back for several hours. Design: Participants will be screened online about their sleep and general health. At a screening visit, participants will have: Physical exam Hearing exam MRI scan. A strong magnetic field and radio waves take pictures of the brain. Participants will lie down on a bed that slides into the scanner, which is shaped like a cylinder. Participants will wear an actigraph on their wrist that records their motor activity. Participants will follow a 2-week routine. This includes regular in-to-bed and out-of-bed times and limits on alcohol, caffeine, and nicotine. During the overnight visits, participants will have: Female subjects will have a urine pregnancy test. fMRI. A coil will be placed over the head. Participants will do tasks shown on a computer screen inside the scanner. EEG. Small electrodes on the scalp will record brain waves while sleeping or doing a task in the scanner. Participants will be asked to try to sleep while researchers collect fMRI and EEG data. Participants eyes will be monitored with a video camera. Headphones will deliver sounds to wake them up throughout the night. ...
BASIC fMRI is a prospective single center intervention trial using fMRI imaging in 9-11 year old obese male and females pre and post family-based behavioral treatment of 24 weeks duration to determine the relationship between impulsivity and central satiety responses.
The investigators propose to examine both resting state activity and functional activity during rumination and during self-processing to study the relationship between neural correlates of rumination/self-focus and self-processing in major depression and bipolar disorder.
A prospective exploratory study in patients with drug resistant epilepsy with a target comparison of long term outcome. NeuroScan software modules and a MagLink will be used to acquire EEG in combination with MRI/fMRI data. The MagLink system is used for obtaining integrated EEG and Event Related Potential (ERP) recordings while the subject is inside the MRI machine, without compromising the raw EEG data.
This study seeks to assess the effects of lisdexamfetamine (trademark name: Vyvanse; LDX) on executive function and prefrontal cortex activation in menopausal women ages 45-57, who report subjective cognitive difficulties. This protocol will recruit women from Dr. Epperson's ongoing study, Protocol #812470, to examine the impact of LDX on brain activation during performance of cognitive tasks specifically probing prefrontal cortex function.
The primary aim of this study is to assess the predictability of treatment response to stimulants in adults with ADHD using functional magnetic resonance This study will be a six-week, open-label study including adults ranging from age 18-55 with ADHD.
This study is investigating the usefulness of using functional magnetic resonance imaging (fMRI) to monitor brain activation during deep brain stimulation for Parkinson's Disease, Essential tremor, dystonia, OCD, depression, pain, Tourette's syndrome, and epilepsy. The study may determine the relationship between patterns of brain activation and therapeutic outcome and/or side effects.
Background: - Functional magnetic resonance imaging (fMRI) is used to study the brain. It takes a series of pictures that can be used to look at how the brain processes information. It is used to study problems with thinking, language, and movement, among other things. Researchers are working to develop new and better fMRI techniques. To test these techniques, they want to perform fMRI scans on healthy volunteers. Objectives: - To test different fMRI techniques in healthy volunteers. Eligibility: - Healthy volunteers at least 18 years of age. Design: * Participants will be screened with a physical exam and medical history. * Participants will have fMRI scans of the brain. During these scans, they will be asked to perform simple tasks. These tasks may involve language, thinking, or motor skills. The scanning sessions will last up to 2 hours. * Participants may be asked to return for additional fMRI scans over several years.
The investigators are seeking to locate the brain regions of interest in generalized anxiety disorder (GAD) using both structural (sMRI) and functional magnetic resonance imaging (fMRI). The MRI will be used to measure changes in blood flow in the brain while at rest and while completing tasks designed to elicit symptoms of anxiety. Results from a nonclinical control group and a GAD group will be compared to determine whether they exhibit different areas of brain activity during the tasks.
The aim of the present study is to determine whether people receiving d-cycloserine and exposure therapy show different brain reactions to symptom provocation compared to people receiving placebo and exposure therapy.
The purpose of this study is to develop a technique to provide feedback of brain activity and to use this technique to reduce levels of craving in nicotine dependent smokers. The researchers will use a brain scan called functional magnetic resonance imaging (MRI). MRI uses magnets to take pictures of your brain. Functional MRI measures brain blood flow that is related to brain activity. This measure of brain activity can be presented or "feedback" to volunteers.
The primary objective of this study aims to determine whether the drug affects brain activity in healthy volunteers, either when the participants are performing a memory task, or when lying at rest. Subjects will undergo a brain scan under both of these conditions after a dose of either the study drug or a placebo is administered.The secondary objective is to evaluate the safety and tolerability of the four doses of PF-04958242 administered orally to healthy adult participants.
General anesthetic medications have been shown to cause neuronal cell death in the brains of infant rodents. Ethanol and general anesthetics both act on NMDA and GABA receptors,and appear to have similar mechanisms of toxicity in the immature rodent brain. Functional MRI (fMRI) is a technique developed for mapping brain activation and has been utilized to examine how the brains of children with a history of early exposure to ethanol function differently from children without such a history. This study will utilize fMRI to look for specific changes in brain activation patterns in children with a history of early exposure to general anesthesia, as compared to children without such exposure.
This protocol, "Repetitive Transcranial Magnetic Stimulation (rTMS) for the Treatment of Major Depressive Disorder (MDD): A Functional Connectivity Magnetic Resonance Imaging (fcMRI) Study," is an open-label pilot treatment study. The purpose of the present protocol is to treat participants with a diagnosis of Major Depressive Disorder with 4 weeks of rTMS, performing fcMRI and EEG studies prior to and following treatment to determine if treatment response is related to changes in fcMRI and/or EEG results. The investigators hypothesize that patients who respond to treatment will display changes in functional connectivity patterns thought to be related to the occurrence of depressive symptoms.
Hypnotic trance and mindfulness meditation have both been shown to have benefits for physical health. The current study seeks to determine if there are distinct patterns of brain activity that correlate with hypnotic trance, mindfulness meditation or both, and to relate these patterns to measurable markers of physical well-being. Precise neuroimaging of heightened attentional states will guide future researchers and practitioners toward more effective techniques of mind/body control.
The goal of this research program is to determine the potential effectiveness of real-time fMRI training in improving mental control over pain.
In this proposal, we plan to dynamically investigate brain response to verum acupuncture (of two different "doses") and placebo acupuncture, using a paradigm that approximates clinical acupuncture practice across multiple treatment sessions in knee osteoarthritis (OA) patients. This proposal aims to: 1) characterize session-to-session brain responses to verum / sham acupuncture treatment (reliability of response) for OA patients, and 2) investigate how different "doses" of acupuncture influence brain response and acupuncture efficacy (impact of dose). The findings of this project will deepen our biological understanding on why and how acupuncture can treat chronic pain and what happens in the brain during the multiple-session acupuncture treatment.
This is an exploratory study to evaluate the usefulness of fMRI as a biomarker to characterize the response to three centrally active drugs and placebo.
Opioid medications are commonly used for pain relief. When given over time, physical dependence can occur. This results in unpleasant side effects--such as agitation and nausea--if opioid medications are suddenly stopped. However, we do not know how withdrawal affects the brain. We know that a medication named Ondansetron can help ease or prevent symptoms associated with opioid withdrawal. Through imaging of the brain by fMRI, we hope to see how opioid withdrawal, with and without the administration of ondansetron, affects brain activity.