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Titolo:
Noradrenergic modulation of tactile responses in rat cortex. Current source-density and unit analyses
Autore:
Lecas, JC;
Indirizzi:
Univ Paris 06, Inst Neurosci, Dept Neuromodulat & Proc Cognit, CNRS,UMR C7624, F-75005 Paris, France Univ Paris 06 Paris France F-75005 CNRS,UMR C7624, F-75005 Paris, France
Titolo Testata:
COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE III-SCIENCES DE LA VIE-LIFE SCIENCES
fascicolo: 1, volume: 324, anno: 2001,
pagine: 33 - 44
SICI:
0764-4469(200101)324:1<33:NMOTRI>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
LOCUS-COERULEUS NEURONS; SOMATOSENSORY CORTICAL-NEURONS; LATERAL GENICULATE-NUCLEUS; MONKEY PREFRONTAL CORTEX; MOVING VISUAL-STIMULI; AUDITORY-CORTEX; BEHAVING RATS; IN-VITRO; ELECTRICAL-STIMULATION; ADRENERGIC-RECEPTORS;
Keywords:
rat; sensorimotor cortex; locus coeruleus stimulation; noradrenaline; CSD; unit activity;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
56
Recensione:
Indirizzi per estratti:
Indirizzo: Lecas, JC Univ Paris 06, Inst Neurosci, Dept Neuromodulat & Proc Cognit, CNRS,UMR C7624, Bat B,6E Etage,9 Quai St Bernard, F-75005 Paris, France UnivParis 06 Bat B,6E Etage,9 Quai St Bernard Paris France F-75005
Citazione:
J.C. Lecas, "Noradrenergic modulation of tactile responses in rat cortex. Current source-density and unit analyses", CR AC S III, 324(1), 2001, pp. 33-44

Abstract

This study describes the noradrenergic modulation of tactile afferent information in the sensorimotor cortex of urethane-anesthetized rats. Synaptic and spike responses to a mechanical stimulation of the hand palm were evaluated by means of current source-density analysis and unit activity recording in all cortical layers. Results showed that activation of the locus coeruleus decreased and shortened efferent synaptic excitation in supragranular,but not in deep layers. On the average, unit responses exhibited facilitated latency, moderately increased amplitude, enhanced postexcitatory inhibition and synchronization of responses across layers. The apparent paradox ofthis global phasic facilitation correlated with a decrease in input synaptic currents was discussed according to hypotheses which might explain its functional significance. (C) 2001 Academie des sciences / Editions scientifiques et medicales Elsevier SAS.

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Documento generato il 03/04/20 alle ore 20:28:22