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147 results for “functional magnetic resonance images”
Data from: Effects of a 60 Hz magnetic field exposure up to 3000 µT on human brain activation as measured by functional magnetic resonance imaging
Several aspects of the human nervous system and associated motor and cognitive processes have been reported to be modulated by extremely low-frequency (ELF, < 300 Hz) time-varying Magnetic Fields (MF). Due do their worldwide prevalence; power-line frequencies (60 Hz in North America) are of particular interest. Despite intense research efforts over the last few decades, the potential effects of 60 Hz MF still need to be elucidated, and the underlying mechanisms to be understood. In this study, we have used functional Magnetic Resonance Imaging (fMRI) to characterize potential changes in functional brain activation following human exposure to a 60 Hz MF through motor and cognitive tasks. First, pilot results acquired in a first set of subjects (N=9) were used to demonstrate the technical feasibility of using fMRI to detect subtle changes in functional brain activation with 60 Hz MF exposure at 1800 μT. Second, a full study involving a larger cohort of subjects tested brain activation during 1) a finger tapping task (N=20), and 2) a mental rotation task (N=21); before and after a one-hour, 60 Hz, 3000 μT MF exposure. The results indicate significant changes in task-induced functional brain activation as a consequence of MF exposure. However, no impact on task performance was found. These results illustrate the potential of using fMRI to identify MF-induced changes in functional brain activation, suggesting that a one-hour 60 Hz, 3000 μT MF exposure can modulate activity in specific brain regions after the end of the exposure period (i.e., residual effects). We discuss the possibility that MF exposure at 60 Hz, 3000 μT may be capable of modulating cortical excitability via a modulation of synaptic plasticity processes.
Contrasting the Brain Effects of Risperidone and Invega With Functional Magnetic Resonance Imaging (fMRI) and Positron Emission Tomography (PET) Scanning
ClinicalTrials.gov study NCT00937261. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Value of Functional Magnetic Resonance Imaging of Hepatocellular Carcinoma After Transarterial Chemoembolization or Transarterial Radioembolization
ClinicalTrials.gov study NCT04702230. IPD Sharing: NO. Countries: 1. Publications: 0.
Locating Regions of Interest in Generalized Anxiety Disorder Using Function Magnetic Resonance Imaging (fMRI)
ClinicalTrials.gov study NCT01607710. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Bridging Gaps in the Neuroimaging Puzzle: New Ways to Image Brain Anatomy and Function in Health and Disease Using Electroencephalography and 7 Tesla Magnetic Resonance Imaging
ClinicalTrials.gov study NCT05769933. IPD Sharing: YES. Countries: 1. Publications: 0.
Functional Magnetic Resonance Imaging of Pancreatic Cancer: a Feasibility and Reproducibility Study
ClinicalTrials.gov study NCT01995240. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Acupuncture for Functional Dyspepsia: a Functional Magnetic Resonance Imaging (fMRI) Study
ClinicalTrials.gov study NCT02996604. IPD Sharing: Not stated. Countries: 1. Publications: 0.
A Study To Assess Effects Of PF-04958242 On Bold Functional Magnetic Resonance Imaging During Working Memory Activation And Arterial Spin Labeling At Rest In Healthy Subjects
ClinicalTrials.gov study NCT01365338. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Functional Magnetic Resonance Imaging (fMRI) Imaging Study in Adolescents With Anorexia Nervosa
ClinicalTrials.gov study NCT00978666. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Identification and Dynamics With Cerebral Functional Magnetic Resonance Imaging
ClinicalTrials.gov study NCT01331070. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Attention and Visual Perception in Schizophrenia: A Functional Magnetic Resonance Imaging (fMRI) Study
ClinicalTrials.gov study NCT00350935. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Magnetic Resonance Imaging of Vascular Function
ClinicalTrials.gov study NCT02206919. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Simultaneous Measurement of Electroencephalography (EEG) and Functional Magnetic Resonance Imaging (fMRI) in Patients With Alcoholism
ClinicalTrials.gov study NCT00216905. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Oxytocin Effect on Attentional Bias Towards Emotional Expression Faces in Individuals With High and Low Autistic Traits: A Functional Magnetic Resonance Imaging (fMRI) Study
ClinicalTrials.gov study NCT02741063. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Recovery of Biographical Memories Associated With a Melody: a Functional Magnetic Resonance Imaging Study
ClinicalTrials.gov study NCT04484519. IPD Sharing: UNDECIDED. Countries: 1. Publications: 0.
Neurorehabilitation After Traumatic Brain Injury: Functional Magnetic Resonance Imaging Study
ClinicalTrials.gov study NCT02698449. IPD Sharing: NO. Countries: 1. Publications: 0.
Functional Evaluation of the Fetal Lung by Functional Magnetic Resonance Imaging - Blood Oxygenation Level Dependent (MRI-BOLD), in Congenital Diaphragmatic and Parietal Malformations
ClinicalTrials.gov study NCT04186039. IPD Sharing: NO. Countries: 1. Publications: 0.
Cerebral Effects of Pulsed Radiofrequency on the Lumbar Dorsal Root Ganglion With Functional Magnetic Resonance Imaging.
ClinicalTrials.gov study NCT03185442. IPD Sharing: NO. Countries: 1. Publications: 0.
Evaluation of Preoperative Functional Magnetic Resonance Imaging (fMRI) in Patients With Brain Tumors
ClinicalTrials.gov study NCT03604302. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Functional and Anatomical Magnetic Resonance Imaging (MRI) of Chronic Brain Injury and Hyperbaric Oxygen (HBO2) Study Subjects
ClinicalTrials.gov study NCT01126515. IPD Sharing: Not stated. Countries: 1. Publications: 0.
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