Exploring a Motor Learning Technique Based on the Mirror Motor Neuron System View Homepage


Ontology type: schema:MedicalStudy     


Clinical Trial Info

YEARS

2009-2012

ABSTRACT

Background: - Techniques that teach finger movements are commonly used to explore how humans learn to move. Researchers have designed a simple, new method of learning finger movements, which will be explored for the first time in this study. The method is based on how individuals mimic other people's movements. - Previous studies have shown that a brain protein called brain-derived neurotrophic factor (BDNF) may be important in movement and in learning. There are normal variations in the gene for BDNF. As an optional component, this study will also look at whether these gene variations are associated with differences in movement learning. Objectives: - To compare the new motor learning technique with a classic technique to test its usefulness. - To examine whether genetic variations have an effect on motor learning. Eligibility: - Healthy volunteers between the ages of 18 and 50, who are right-handed. Design: - The study will involve two visits to the National Institutes of Health Clinical Center. - Visit 1: Medical and neurologic examination to determine whether the volunteer is eligible to participate further in the study. This screening visit will take about 1 hour. - Visit 2: Volunteers will perform a motor learning task by interacting with a computer program. In response to images on the computer monitor, volunteers will press buttons on the keyboard as quickly and accurately as possible. The motor learning task will last up to 3 hours. - If a volunteer agrees to genetic testing, researchers will also draw blood for study. Genetic testing is not required to participate in the motor learning parts of the study. Detailed Description Objective Humans develop skilled movements such as using a spoon or dancing a waltz through a process known as "motor learning. Harnessing this innate process for its therapeutic potential is an attractive strategy to help patients suffering from diseases of movement disorders, yet we do not yet fully understand the normal phenomenon. This study will utilize new paradigms to explore the physiology of motor learning. It will test the validity of a traditional motor learning task that has been modified to invoke the mirror neuron system and odor conditioning. Additionally, by taking advantage of the unique opportunity to assess motor learning awareness immediately following the task, it will also explore this behavioral-cognitive relationship. Thus, this work will lay the foundation for further physiologic characterization of a novel motor learning technique and may support the development of future therapies. Study Population We will study up to one hundred fifty-two healthy, right-handed volunteers who are 18 to 50 years old. Design In phase I of the study, volunteers will be seated in front of a computer monitor with their right hands on a keyboard and respond to visual cues presented on the monitor by pressing the associated, finger-specific keys as quickly and accurately as possible. Each volunteer will be presented only the standard visuospatial or the novel mirror cues, defining the two reaction time task paradigms and experimental groups. In phases II and III of the study, a similar task will take place while subjects undergo magnetic resonance imaging scanning either in the presence or absence of an odor. In addition to the motor learning tasks above, volunteers will have the option to participate in genetic testing for normal genetic variability that may affect motor learning. Outcome Measure The primary outcomes are motor learning and awareness, which will be measured by the key-press reaction time and accuracy, respectively. More... »

URL

https://clinicaltrials.gov/show/NCT00872183

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