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Titolo:
Auditory steady-state responses to click trains from the rat temporal cortex
Autore:
Conti, G; Santarelli, R; Grassi, C; Ottaviani, F; Azzena, GB;
Indirizzi:
Catholic Univ Sacred Heart, Inst ENT Clin, I-00168 Rome, Italy Catholic Univ Sacred Heart Rome Italy I-00168 Clin, I-00168 Rome, Italy Catholic Univ Sacred Heart, Inst Human Physiol, I-00168 Rome, Italy Catholic Univ Sacred Heart Rome Italy I-00168 ysiol, I-00168 Rome, Italy
Titolo Testata:
CLINICAL NEUROPHYSIOLOGY
fascicolo: 1, volume: 110, anno: 1999,
pagine: 62 - 70
SICI:
1388-2457(199901)110:1<62:ASRTCT>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVOKED-POTENTIALS; FIELDS; CAT; GENERATION; ANESTHESIA; MODULATION; AMPLITUDE; TRANSIENT; STIMULI; SYSTEMS;
Keywords:
auditory evoked potential; middle-latency auditory evoked potential; steady-state response; repetition rate; adaptation; rat;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
44
Recensione:
Indirizzi per estratti:
Indirizzo: Conti, G Catholic Univ Sacred Heart, Clin ORL, Largo Gemelli 8, I-00168 Rome, Italy Catholic Univ Sacred Heart Largo Gemelli 8 Rome Italy I-00168 ly
Citazione:
G. Conti et al., "Auditory steady-state responses to click trains from the rat temporal cortex", CLIN NEU, 110(1), 1999, pp. 62-70

Abstract

In order to investigate the mechanisms underlying the generation of steady-state responses (SSRs), auditory evoked potentials elicited by click trains presented at several stimulation rates (30, 40, 50, 60 Hz) were recorded in 7 awake rats by means of epidural electrodes placed over the temporal cortex. Mean amplitude-rate function calculated on the recorded responses appeared almost flat and showed the maximum value at 50 Hz, while mean phases showed a linear increase when increasing the stimulation rate. In each rat,predictions of the recorded responses at 30, 40, 50 and 60 Hz were synthesized by superimposing middle-latency auditory evoked potentials (MAEPs) at suitable time intervals at each rate. Mean amplitudes calculated on the predicted curves decreased linearly when increasing the stimulation rate and appeared higher in comparison to those obtained from the recorded SSRs. Predicted phases showed a linear increase when increasing the stimulation rate and were leading with respect to corresponding phase values calculated for recorded SSRs. Our findings indicate that the MAEP superimposition mechanism does not adequately predict the generation of temporal recorded SSRs in rats. This was explained by admitting that phenomena related to the recoverycycle and, to a lesser extent, to rate-dependent facilitating effects comeinto play. (C) 1999 Elsevier Science Ireland Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/01/20 alle ore 09:46:42