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Titolo:
Real time mapping of rat midbrain neural circuitry using auditory evoked potentials
Autore:
Moraes, MFD; Garcia-Cairasco, N;
Indirizzi:
Univ Fed Minas Gerais, Dept Physiol & Biophys, Inst Biol Sci, Belo Horizonte, MG, Brazil Univ Fed Minas Gerais Belo Horizonte MG Brazil elo Horizonte, MG, Brazil Univ Sao Paulo, Neurophysiol & Expt Neuroethol Lab, Dept Physiol, RibeiraoPreto Sch Med, BR-14049900 Ribeirao Preto, SP, Brazil Univ Sao Paulo Ribeirao Preto SP Brazil BR-14049900 BCo Preto, SP, Brazil
Titolo Testata:
HEARING RESEARCH
fascicolo: 1-2, volume: 161, anno: 2001,
pagine: 35 - 44
SICI:
0378-5955(200111)161:1-2<35:RTMORM>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
INFERIOR COLLICULUS LESIONS; LOCALIZATION; BRAIN; RECORDINGS; RESPONSES; CAT;
Keywords:
electric field vector; auditory evoked potential; neural circuitry; functional mapping;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Garcia-Cairasco, N Univ Fed Minas Gerais, Dept Physiol & Biophys, Inst Biol Sci, Belo Horizonte, MG, Brazil Univ Fed Minas Gerais Belo Horizonte MG Brazil Brazil
Citazione:
M.F.D. Moraes e N. Garcia-Cairasco, "Real time mapping of rat midbrain neural circuitry using auditory evoked potentials", HEARING RES, 161(1-2), 2001, pp. 35-44

Abstract

Auditory evoked potentials were recorded in 360 homogeneously spaced sites, in a volume encapsulating the lateral lemniscus-inferior colliculus transition of anaesthetized rats, in order to calculate the electric field vector distribution with each moment in time referenced to the onset of sound presentation. Software. to conduct calculations and graphical representation,and hardware, to minimize neural damage upon recording, were developed in our laboratory. Our results indicate a smooth transition of both amplitude and direction of vectors, suggestive of sequentially activated sites with outward and inward ionic currents coherent with what is known of this part of the primary auditory pathway. That is, anatomical sites (neural generators) and latency for activation matches previous research of the auditory pathway. while adding a real time perspective to the anatomical substrates recruited during the auditory evoked response. An algorithm for calculating the divergent of the vector field, an estimate of the current source density inside the three-dimensional control volume, was used to infer the possiblecurrent sinks and sources generating the field potentials. This technique allowed a clear visualization of two distinct discharges arising from the lateral lemniscus towards the inferior colliculus, thus recording signal propagation, as a movie file, with 0.06 ms time resolution. (C) 2001 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 22/01/20 alle ore 06:25:07