The organization of prefrontal-subthalamic inputs in primates provides an anatomical substrate for both functional specificity and integration: implications for basal ganglia models and deep brain stimulation
Identifieur interne : 000638 ( Pmc/Corpus ); précédent : 000637; suivant : 000639The organization of prefrontal-subthalamic inputs in primates provides an anatomical substrate for both functional specificity and integration: implications for basal ganglia models and deep brain stimulation
Auteurs : William I. A. Haynes ; Suzanne N. HaberSource :
- The Journal of neuroscience : the official journal of the Society for Neuroscience [ 0270-6474 ] ; 2013.
Abstract
The identification of a hyperdirect cortico-subthalamic nucleus connection highlighted the important role of the subthalamic nucleus (STN) in regulating behavior. However, this pathway was shown primarily from motor areas. Hyperdirect pathways associated with cognitive and motivational cortical regions are particularly relevant given recent data from deep brain stimulation, both for neurological and psychiatric disorders. Our experiments were designed to: demonstrate the existence and organization of prefrontal-STN projections, help delineate the ‘limbic’ STN, and determine whether convergence between cortico-STN fibers from functionally diverse cortical areas exists in the STN. We injected anterograde tracers in the ventromedial prefrontal, orbitofrontal, anterior cingulate and dorsal prefrontal cortices of
Results show a topographically organized prefrontal hyperdirect pathway in primates. Limbic areas project to the medial tip of the nucleus, straddling its border and extending into the lateral hypothalamus. Associative areas project to the medial half, motor areas to the lateral half. Limbic projections terminated primarily rostrally and motor projections more caudally. The extension of limbic projections into the lateral hypothalamus, suggests that this region be included in the STN. A high degree of convergence exists between projections from functionally diverse cortical areas, creating potentially important interfaces between terminal fields. Taken together, the results provide an anatomical substrate to extend the role of the hyperdirect pathway in models of basal ganglia function, and new keys for understanding deep brain stimulation effects on cognitive and motivational aspects of behavior.
Url:
DOI: 10.1523/JNEUROSCI.4674-12.2013
PubMed: 23486951
PubMed Central: 3755746
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PMC:3755746Le document en format XML
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<front><div type="abstract" xml:lang="en"><p id="P1">The identification of a hyperdirect cortico-subthalamic nucleus connection highlighted the important role of the subthalamic nucleus (STN) in regulating behavior. However, this pathway was shown primarily from motor areas. Hyperdirect pathways associated with cognitive and motivational cortical regions are particularly relevant given recent data from deep brain stimulation, both for neurological and psychiatric disorders. Our experiments were designed to: demonstrate the existence and organization of prefrontal-STN projections, help delineate the ‘limbic’ STN, and determine whether convergence between cortico-STN fibers from functionally diverse cortical areas exists in the STN. We injected anterograde tracers in the ventromedial prefrontal, orbitofrontal, anterior cingulate and dorsal prefrontal cortices of <italic>Macaca nemestrina & M. fascicularis</italic>
to analyze the organization of terminals and passing fibers in the STN.</p>
<p id="P2">Results show a topographically organized prefrontal hyperdirect pathway in primates. Limbic areas project to the medial tip of the nucleus, straddling its border and extending into the lateral hypothalamus. Associative areas project to the medial half, motor areas to the lateral half. Limbic projections terminated primarily rostrally and motor projections more caudally. The extension of limbic projections into the lateral hypothalamus, suggests that this region be included in the STN. A high degree of convergence exists between projections from functionally diverse cortical areas, creating potentially important interfaces between terminal fields. Taken together, the results provide an anatomical substrate to extend the role of the hyperdirect pathway in models of basal ganglia function, and new keys for understanding deep brain stimulation effects on cognitive and motivational aspects of behavior.</p>
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Department of Pharmacology and Physiology, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, USA</aff>
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Centre de Recherche de l’Institut du Cerveau et de la Moelle Epiniere (CRICM) - Inserm U 975, CNRS 7225, UPMC, 75005 Paris, France</aff>
<author-notes><corresp id="cor1">Corresponding Author: Suzanne N. Haber, Dept. of Pharmacology and Physiology, University of Rochester School of Medicine and Dentistry, 601 Elmwood Ave., Rochester, NY 14642, Phone: 585-275-4538, <email>Suzanne_haber@urmc.rochester.edu</email>
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<abstract><p id="P1">The identification of a hyperdirect cortico-subthalamic nucleus connection highlighted the important role of the subthalamic nucleus (STN) in regulating behavior. However, this pathway was shown primarily from motor areas. Hyperdirect pathways associated with cognitive and motivational cortical regions are particularly relevant given recent data from deep brain stimulation, both for neurological and psychiatric disorders. Our experiments were designed to: demonstrate the existence and organization of prefrontal-STN projections, help delineate the ‘limbic’ STN, and determine whether convergence between cortico-STN fibers from functionally diverse cortical areas exists in the STN. We injected anterograde tracers in the ventromedial prefrontal, orbitofrontal, anterior cingulate and dorsal prefrontal cortices of <italic>Macaca nemestrina & M. fascicularis</italic>
to analyze the organization of terminals and passing fibers in the STN.</p>
<p id="P2">Results show a topographically organized prefrontal hyperdirect pathway in primates. Limbic areas project to the medial tip of the nucleus, straddling its border and extending into the lateral hypothalamus. Associative areas project to the medial half, motor areas to the lateral half. Limbic projections terminated primarily rostrally and motor projections more caudally. The extension of limbic projections into the lateral hypothalamus, suggests that this region be included in the STN. A high degree of convergence exists between projections from functionally diverse cortical areas, creating potentially important interfaces between terminal fields. Taken together, the results provide an anatomical substrate to extend the role of the hyperdirect pathway in models of basal ganglia function, and new keys for understanding deep brain stimulation effects on cognitive and motivational aspects of behavior.</p>
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<funding-group><award-group><funding-source country="United States">National Institute of Mental Health : NIMH</funding-source>
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