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Titolo:
Corticofugal modulation of functional connectivity within the auditory thalamus of rat, guinea pig and cat revealed by cooling deactivation
Autore:
Villa, AEP; Tetko, IV; Dutoit, P; De Ribaupierre, Y; De Ribaupierre, F;
Indirizzi:
Univ Lausanne, Fac Med, Inst Physiol, CH-1005 Lausanne, Switzerland Univ Lausanne Lausanne Switzerland CH-1005 CH-1005 Lausanne, Switzerland Ukrainian Acad Sci, IBPC, Dept Biomed Applicat, UA-253660 Kiev, Ukraine Ukrainian Acad Sci Kiev Ukraine UA-253660 licat, UA-253660 Kiev, Ukraine
Titolo Testata:
JOURNAL OF NEUROSCIENCE METHODS
fascicolo: 2, volume: 86, anno: 1999,
pagine: 161 - 178
SICI:
0165-0270(199901)86:2<161:CMOFCW>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
LATERAL GENICULATE-NUCLEUS; DECARBOXYLASE-IMMUNOREACTIVE NEURONS; SPATIOTEMPORAL FIRING PATTERNS; VISUAL-CORTEX; CRYOGENIC BLOCKADE; CORTICAL INPUT; MONKEY; INFORMATION; BODY; TRANSMISSION;
Keywords:
reversible inactivation; auditory thalamus; medial geniculate body; auditory cortex; single unit; crosscorrelations; bispectral analysis; spatiotemporal patterns;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
49
Recensione:
Indirizzi per estratti:
Indirizzo: Villa, AEP Univerlandnne, Fac Med, Inst Physiol, Rue Bugnon 7, CH-1005 Lausanne, Switz Univ Lausanne Rue Bugnon 7 Lausanne Switzerland CH-1005 Switz
Citazione:
A.E.P. Villa et al., "Corticofugal modulation of functional connectivity within the auditory thalamus of rat, guinea pig and cat revealed by cooling deactivation", J NEUROSC M, 86(2), 1999, pp. 161-178

Abstract

Microelectrode recordings were simultaneously performed at multiple sites in the medial geniculate body (MCB) of anesthetized cats, rats and guinea pigs. We studied the effect of cortical deactivation on the association of neural activity within the thalamus during spontaneous activity. The corticofugal influence was suppressed by temporary cooling of the auditory cortex. Pairs of spike trains recorded from the same electrode were distinguished from cases where units were in MCB but recorded with different electrodes. Time domain analyses included crosscorrelations and search for precise repetition of complex spatiotemporal firing patterns of reverberating thalamic circuits. As a complementary approach we performed bispectral analyses of simultaneously recorded local field potentials in order to uncover the frequency components of their power spectra which are non linearly coupled. All results suggest that new functional neuronal circuits might appear at the thalamic level in the absence of input from the cortex. The newly active intrathalamic connections would provide the necessary input to sustain the reverberating activity of thalamic cell assemblies and generate low frequency non-linear interactions. The dynamic control exerted by the cortex over thefunctional segregation of information processing carried out in the thalamus conforms with theoretical neural network studies and with the functionalselectivity-adaptive filtering theory of thalamic neuronal assemblies. Although this general conclusion remains valid across species, specific differences are discussed in the frame of known differences of the microcircuitryelements. (C) 1999 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/11/20 alle ore 14:35:46