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- W2029396573 abstract "Abstract In primates, thalamostriatal projections from the centromedian (CM) and parafascicular (Pf) nuclei are strong and organized according to a strict pattern of functional connectivity with various regions of the striatal complex. In turn, the CM/Pf complex receives a substantial innervation from the internal globus pallidus (GPi). In this study, we demonstrate that the substantia nigra pars reticulata (SNr) also provides a massive input to Pf in monkeys. These pallidothalamic and nigrothalamic projections provide routes whereby information can flow in functional loops between the basal ganglia and the intralaminar nuclear group. To understand better the anatomical organization and the degree of functional specificity of these loops, we combined retrograde and anterograde labeling methods from functionally defined regions of the striatum and GPi/SNr to determine the relationships between thalamostriatal neurons and basal ganglia afferents. Together with previous studies, our data suggest the existence of tightly connected functional circuits between the basal ganglia and the CM/Pf in primates: 1) A “sensorimotor” circuit links together the medial two‐thirds of CM, the postcommissural putamen, and the ventrolateral part of the caudal GPi; 2) a “limbic” circuit involves the rostral one‐third of Pf, the ventral striatum, and the rostromedial pole of GPi; and 3) an “associative”circuit exists between the caudal two‐thirds of Pf, the caudate nucleus, and the SNr. An additional “associative” circuit that involves the caudate‐receiving territory of GPi (dorsal one‐third), the dorsolateral Pf (Pfdl), and the precommissural putamen was also disclosed. In conclusion, findings of this study provide additional evidence for the high degree of functional specificity of the thalamostriatal system through which CM/Pf may provide attention‐specific sensory information important for conditional responses to the primate striatum. J. Comp. Neurol. 447:286–299, 2002. © 2002 Wiley‐Liss, Inc." @default.
- W2029396573 created "2016-06-24" @default.
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- W2029396573 date "2002-04-25" @default.
- W2029396573 modified "2023-10-18" @default.
- W2029396573 title "Nigral and pallidal inputs to functionally segregated thalamostriatal neurons in the centromedian/parafascicular intralaminar nuclear complex in monkey" @default.
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- W2029396573 doi "https://doi.org/10.1002/cne.10247" @default.
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