At a glance
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Interhemispheric Interaction of Parieto-Motor Cortico-Cortical Plasticity in Human Brain
In Brief
An observational study for Healthy Volunteers. Withdrawn before enrollment.
Signals
Detailed Summary
Background: The two hemispheres of the brain are connected. Changes in one hemisphere affect the other through this connection. Research has shown that training new skills in one hand improves the same skills for the other hand. Researchers want to learn more about how the brain works to transfer the skills to the other hand. Objective: To learn how changes on one side of the brain affect the other side. To study the activity of the left and right sides of the brain in healthy adults. Eligibility: Healthy volunteers ages 18-55 years old who are right-handed. Design: Participants will be screened with a medical history and physical exam. They will complete a questionnaire about their handedness. This may be done on paper or on a computer. Participants may have urine pregnancy tests. Participants will have 2 study visits. Participants will have a structural magnetic resonance imaging (MRI) scan. MRI uses a strong magnetic field and radio waves to take pictures of the brain. The scanner is a metal cylinder in a strong magnetic field. Participants will lie on a table that slides in and out of the cylinder. Participants will have transcranial magnetic stimulation (TMS). Two wire coils will be placed on the scalp. A brief electrical current passes through the coil and creates a magnetic pulse that affects brain activity. Participants may be asked to tense certain muscles or do simple tasks during TMS. Participants will have electromyography. Small sticky pad electrodes will be attached to the skin on the hands. Muscle activity will be recorded during the TMS procedure.