The thalamocortical projection systems in primate: an anatomical support for multisensory and sensorimotor interplay.

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Etat: Public
Version: de l'auteur⸱e
ID Serval
serval:BIB_BC7E98CD4321
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
The thalamocortical projection systems in primate: an anatomical support for multisensory and sensorimotor interplay.
Périodique
Cerebral Cortex
Auteur⸱e⸱s
Cappe C., Morel A., Barone P., Rouiller E.M.
ISSN
1460-2199[electronic]
Statut éditorial
Publié
Date de publication
2009
Volume
19
Numéro
9
Pages
2025-2037
Langue
anglais
Résumé
Multisensory and sensorimotor integrations are usually considered to occur in superior colliculus and cerebral cortex, but few studies proposed the thalamus as being involved in these integrative processes. We investigated whether the organization of the thalamocortical (TC) systems for different modalities partly overlap, representing an anatomical support for multisensory and sensorimotor interplay in thalamus. In 2 macaque monkeys, 6 neuroanatomical tracers were injected in the rostral and caudal auditory cortex, posterior parietal cortex (PE/PEa in area 5), and dorsal and ventral premotor cortical areas (PMd, PMv), demonstrating the existence of overlapping territories of thalamic projections to areas of different modalities (sensory and motor). TC projections, distinct from the ones arising from specific unimodal sensory nuclei, were observed from motor thalamus to PE/PEa or auditory cortex and from sensory thalamus to PMd/PMv. The central lateral nucleus and the mediodorsal nucleus project to all injected areas, but the most significant overlap across modalities was found in the medial pulvinar nucleus. The present results demonstrate the presence of thalamic territories integrating different sensory modalities with motor attributes. Based on the divergent/convergent pattern of TC and corticothalamic projections, 4 distinct mechanisms of multisensory and sensorimotor interplay are proposed.
Mots-clé
Afferent Pathways/cytology, Animals, Efferent Pathways/cytology, Macaca fascicularis, Macaca mulatta, Models, Anatomic, Models, Neurological, Motor Cortex/cytology, Somatosensory Cortex/cytology, Thalamus/cytology
Pubmed
Web of science
Open Access
Oui
Création de la notice
09/02/2010 9:54
Dernière modification de la notice
20/08/2019 16:30
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