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Titolo:
A comparative analysis of the morphology of corticothalamic projections inmammals
Autore:
Rouiller, EM; Welker, E;
Indirizzi:
Univ Fribourg, Inst Physiol, CH-1700 Fribourg, Switzerland Univ Fribourg Fribourg Switzerland CH-1700 CH-1700 Fribourg, Switzerland Univ Lausanne, Inst Cell & Mol Biol, Lausanne, Switzerland Univ Lausanne Lausanne Switzerland ll & Mol Biol, Lausanne, Switzerland
Titolo Testata:
BRAIN RESEARCH BULLETIN
fascicolo: 6, volume: 53, anno: 2000,
pagine: 727 - 741
SICI:
0361-9230(200012)53:6<727:ACAOTM>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
MEDIAL GENICULATE-BODY; PRIMARY AUDITORY-CORTEX; SQUIRREL SCIURUS-CAROLINENSIS; MEDIODORSAL THALAMIC NUCLEUS; LATERAL POSTERIOR NUCLEUS; PRIMARY VISUAL-CORTEX; LEUKOAGGLUTININ PHA-L; BARREL FIELD CORTEX; INFERIOR COLLICULUS; CORTICOFUGAL MODULATION;
Keywords:
rodent; cat; monkey; tracing; thalamus; auditory cortex; visual cortex; motor cortex; somatosensory cortex;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
96
Recensione:
Indirizzi per estratti:
Indirizzo: Rouiller, EM Univ Fribourg, Inst Physiol, Rue Musee 5, CH-1700 Fribourg, Switzerland Univ Fribourg Rue Musee 5 Fribourg Switzerland CH-1700 rland
Citazione:
E.M. Rouiller e E. Welker, "A comparative analysis of the morphology of corticothalamic projections inmammals", BRAIN RES B, 53(6), 2000, pp. 727-741

Abstract

Recent anatomical tracing methods have revealed new principles underlying the organization of corticothalamic connections in the mammalian nervous system. These data demonstrated the distribution of two types of synaptic contacts in the corticothalamic projection: small (<1 <mu>m) and giant (2-10 pm) axon terminals. We compare the organization of corticothalamic projections in the auditory, somatosensory, visual, and motor systems of a variety of mammalian species, including the monkey. In all these systems and species, both types of corticothalamic terminals have been observed. Small endingsformed the major corticothalamic terminal field, whereas giant terminals were less numerous and formed additional terminal fields together with smallterminals. After comparing their spatial distribution, as well as the degree of reciprocity between the corticothalamic and thalamocortical projections, different roles are proposed for small and giant endings, Small terminals are typically present in the projection serving the feed-back control ofthe cerebral cortex on the thalamic nucleus from which it receives its main projection. In contrast, giant terminals are involved in feed-forward projections by which activity from a cortical area is distributed, via the thalamus, to other parts of the cerebral cortex, The cross-species and cross-systems comparison reveals differences in the mode of feed-forward projection, which may be involved in the activation of other parts of the same cortical area or form part of a projection that activates other cortical areas, (C) 2001 Elsevier Science Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/11/20 alle ore 04:43:48