Unraveling the differential functions and regulation of striatal neuron sub-populations in motor control, reward, and motivational processes
The striatum, the major input structure of the basal ganglia, is critically involved in motor control and learning of habits and skills, and is also involved in motivational and reward processes. The dorsal striatum, caudate-putamen, is primarily implicated in motor functions whereas the ventral str...
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Published in | Frontiers in behavioral neuroscience Vol. 5; p. 47 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Switzerland
Frontiers Research Foundation
28.07.2011
Frontiers Media S.A |
Subjects | |
Online Access | Get full text |
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Summary: | The striatum, the major input structure of the basal ganglia, is critically involved in motor control and learning of habits and skills, and is also involved in motivational and reward processes. The dorsal striatum, caudate-putamen, is primarily implicated in motor functions whereas the ventral striatum, the nucleus accumbens, is essential for motivation and drug reinforcement. Severe basal ganglia dysfunction occurs in movement disorders as Parkinson's and Huntington's disease, and in psychiatric disorders such as schizophrenia and drug addiction. The striatum is essentially composed of GABAergic medium-sized spiny neurons (MSNs) that are output neurons giving rise to the so-called direct and indirect pathways and are targets of the cerebral cortex and mesencephalic dopaminergic neurons. Although the involvement of striatal sub-areas in motor control and motivation has been thoroughly characterized, major issues remained concerning the specific and respective functions of the two MSNs sub-populations, D(2)R-striatopallidal (dopamine D(2) receptor-positive) and D(1)R-striatonigral (dopamine D(1) receptor-positive) neurons, as well as their specific regulation. Here, we review recent advances that gave new insight in the understanding of the differential roles of striatopallidal and striatonigral neurons in the basal ganglia circuit. We discuss innovative techniques developed in the last decade which allowed a much precise evaluation of molecular pathways implicated in motivational processes and functional roles of striatopallidal and striatonigral neurons in motor control and in the establishment of reward-associated behavior. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 ObjectType-Article-1 ObjectType-Feature-2 Edited by: Gilberto Fisone, Karolinska Institutet, Sweden Reviewed by: Gilberto Fisone, Karolinska Institutet, Sweden; Denis Hervé, Institut du Fer-à-Moulin, France |
ISSN: | 1662-5153 1662-5153 |
DOI: | 10.3389/fnbeh.2011.00047 |