Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
INTERAURAL DELAY-DEPENDENT CHANGES IN THE BINAURAL DIFFERENCE POTENTIAL IN CAT AUDITORY BRAIN-STEM RESPONSE - IMPLICATIONS ABOUT THE ORIGINOF THE BINAURAL INTERACTION COMPONENT
Autore:
UNGAN P; YAGCIOGLU S; OZMEN B;
Indirizzi:
HACETTEPE UNIV,FAC MED,DEPT BIOPHYS TR-06100 ANKARA TURKEY
Titolo Testata:
Hearing research
fascicolo: 1-2, volume: 106, anno: 1997,
pagine: 66 - 82
SICI:
0378-5955(1997)106:1-2<66:IDCITB>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
LATERAL SUPERIOR OLIVE; STEM EVOKED-POTENTIALS; TRAPEZOID BODY; TIME DIFFERENCES; COINCIDENCE DETECTION; REPETITION RATE; GUINEA-PIGS; NEURONS; INTENSITY; STIMULI;
Keywords:
SOUND LATERALIZATION; INTERAURAL TIME DIFFERENCE; AUDITORY BRAIN-STEM RESPONSE; BINAURAL DIFFERENCE POTENTIAL; BINAURAL INTERACTION COMPONENT; SUPERIOR OLIVARY COMPLEX; CAT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
73
Recensione:
Indirizzi per estratti:
Citazione:
P. Ungan et al., "INTERAURAL DELAY-DEPENDENT CHANGES IN THE BINAURAL DIFFERENCE POTENTIAL IN CAT AUDITORY BRAIN-STEM RESPONSE - IMPLICATIONS ABOUT THE ORIGINOF THE BINAURAL INTERACTION COMPONENT", Hearing research, 106(1-2), 1997, pp. 66-82

Abstract

Auditory brainstem responses (ABRs) evoked by dichotic clicks with 12different interaural delays (ITDs) between 0 and 1500 mu s were recorded from the vertices of 10 cats under ketamine anesthesia. The so-called binaural difference potential (BDP), considered to be an indicatorof binaural interaction (BI), was computed by subtracting the sum of the two monaural responses From the binaural one. The earliest and most prominent component of BDP was a negative deflection (DN1) at a latency between 4 and 4.8 ms. Like all the other components of BDP, DN1 was also due to binaural reduction rather than enhancement of the corresponding ABR wave, P4 in this case. Furthermore, the way its latency increased as a function of ITD was also not compatible with what would be predicted by the delay-line coincidence detector models based on theexcitatory-excitatory units in the medial superior olive (MSG). We therefore proposed an alternative hypothesis for the origin of this BI component based on the inhibitory-excitatory (IE) units in the lateral superior olive (LSO). The computational model designed closely simulated the ITD-dependent attenuation and latency shifts observed in DN1. It was therefore concluded that the origin of this BI component in the cat's vertex-ABR could be the lateral lemniscal output of the LSO, although the delay lines which have been shown to exist also in the mammalian brain may play an important role in encoding ITDs.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/07/20 alle ore 22:11:22