1279 lines
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<meta name="description" content="Voluntary movements involve the coordinated activation of two brain pathways that connect parts of deep brain structures called the basal ganglia, according to a study in mice by researchers at the National Institute on Alcohol Abuse and Alcoholism (NIAAA), part of the National Institutes of Health. The findings, which challenge the classical view of basal ganglia function, were published online in Nature on Jan. 23." />
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<title>NIH study advances understanding of movement control | National Institute on Alcohol Abuse and Alcoholism (NIAAA)</title>
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NIH study advances understanding of movement control
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<p><time datetime="2013-01-28T12:00:00Z">Monday, January 28, 2013</time>
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<p>Voluntary movements involve the coordinated activation of two brain pathways that connect parts of deep brain structures called the basal ganglia, according to a study in mice by researchers at the National Institute on Alcohol Abuse and Alcoholism (NIAAA), part of the National Institutes of Health. The findings, which challenge the classical view of basal ganglia function, were published online in Nature on Jan. 23.</p>
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<p>“By improving our understanding of how the basal ganglia control movements, these findings could aid in the development of treatments for disorders in which these circuits are disrupted, such as Parkinson’s disease, Huntington’s disease and addiction,” says NIAAA Acting Director Kenneth R. Warren, Ph.D.</p>
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<p>The predominant model of basal ganglia function proposes that direct and indirect pathways originating in a brain region called the striatum have opposing effects on movement. Activity of neurons in the direct pathway is thought to promote movement, while activity in the indirect pathway is thought to inhibit movement. Newer models, however, suggest that co-activation of these pathways is necessary to synchronize basal ganglia circuits during movement.</p>
|
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<p>“Testing these models has been difficult due to the lack of methods to measure specific neurons in the direct and indirect pathways in freely moving animals,” explains first author Guohong Cui, Ph.D., of the NIAAA Laboratory for Integrated Neuroscience (LIN).</p>
|
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<p>To overcome these difficulties, Dr. Cui and senior author Rui Costa, Ph.D., D.V.M, worked with LIN chief David M. Lovinger Ph.D., NIAAA Cellular Biophotonics Section Acting Chief Steven Vogel, Ph.D., and their colleagues to devise a new approach for measuring the activity of neurons deep within the brain during complex behaviors. Their technique uses fiber optic probes implanted in the mouse brain striatum to measure light emissions from neurons engineered to glow when activated.</p>
|
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<p>Using this new approach, the researchers detected neural activity in both the direct and indirect pathways when mice performed a bar-pressing task. No such activity was detected when the mice were inactive.</p>
|
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<p>“These neuronal activity patterns differ from previous predictions that one pathway would be active when animals begin moving while another would be active when animals are at rest,” notes Dr. Costa, of the Champalimaud Neuroscience Program in Lisbon, Portugal.</p>
|
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<p>Drs. Lovinger and Vogel add that the new technique developed for this study will be useful for studying a variety of neuron types in other brain regions during performance of a full repertoire of behaviors.</p>
|
||
<p><strong>Reference</strong><p>
|
||
<p>Concurrent Activation of Striatal Direct and Indirect Pathways During Action Initiation<br>
|
||
Guohong Cui, et al.<br>
|
||
<em>Nature </em><br>
|
||
(January 23, 2013)</p>
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<p><strong>About the National Institute on Alcohol Abuse and Alcoholism (NIAAA):</strong><br>
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The National Institute on Alcohol Abuse and Alcoholism (NIAAA), part of the National Institutes of Health, is the primary U.S. agency for conducting and supporting research on the causes, consequences, diagnosis, prevention, and treatment of alcohol use disorder. NIAAA also disseminates research findings to general, professional, and academic audiences. Additional alcohol research information and publications are available at <a href="/" rel="nofollow noreferrer">www.niaaa.nih.gov</a>.</p>
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NIH, the nation's medical research agency, includes 27 Institutes and Centers and is a component of the U.S. Department of Health and Human Services. NIH is the primary federal agency conducting and supporting basic, clinical, and translational medical research, and is investigating the causes, treatments, and cures for both common and rare diseases. For more information about NIH and its programs, visit <a href="https://www.nih.gov/" rel="noreferrer noopener">www.nih.gov</a>.</p>
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