Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Significance of auditory evoked responses (EABR and P300) in cochlear implant subjects
Autore:
Kubo, T; Yamamoto, K; Iwaki, T; Matsukawa, M; Doi, K; Tamura, M;
Indirizzi:
Osaka Univ, Grad Sch Med E8, Dept Otolaryngol, Osaka 6570016, Japan Osaka Univ Osaka Japan 6570016 8, Dept Otolaryngol, Osaka 6570016, Japan
Titolo Testata:
ACTA OTO-LARYNGOLOGICA
fascicolo: 2, volume: 121, anno: 2001,
pagine: 257 - 261
SICI:
0001-6489(200101)121:2<257:SOAER(>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVENT-RELATED POTENTIALS; ELECTRICAL-STIMULATION; DISCRIMINATION; NERVE; SURVIVAL;
Keywords:
speech reception; post-lingual deafness; event related potential; auditory plasticity;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Kubo, T Osaka Univ, Grad Sch Med E8, Dept Otolaryngol, 2-2 Yamada Oka, Osaka 6570016, Japan Osaka Univ 2-2 Yamada Oka Osaka Japan 6570016 saka 6570016, Japan
Citazione:
T. Kubo et al., "Significance of auditory evoked responses (EABR and P300) in cochlear implant subjects", ACT OTO-LAR, 121(2), 2001, pp. 257-261

Abstract

An electrically derived auditory brainstem response (EABR) was recorded intra-operatively, and the event-related potential (P300) postoperatively in post-lingually deaf adult cochlear implantees. EABR and P300 were recorded from two groups of 25 subjects each. All subjects had a cochlear mini-22 system implanted at our center between 1994 and 1998. Two parameters of EABR,threshold (T) and the gradient of the amplitude-growth (AG) curve, were used for correlation with postoperative speech reception scores. The consonant recognition score (CRS) measured 1 month postoperatively showed a significant correlation with the AG curve of EABR (Spearman rank order test, p = 0.004), but not at later points in time. No correlation was found between the T and CRS at any time postoperatively. As the AG curve reflects the number of remaining spiral ganglion cells in the inner ear, a large number of surviving neurons is thought to be advantageous only for initial speech learning. The latency of P300 was measured for correlation with the speech reception score. The division of the cochlear implant subjects into a fair and agood hearing group according to their CRS showed that the average latency of P300 was significantly longer for the fair hearing group than for the good hearing group. A follow-up study showed that P300 latency significantly correlated with CRS measured at 6 months, 1 year and at a later time. As the latency of P300 is thought to reflect the time for sound processing in the central auditory system, our results indicate that plasticity of the central auditory system is more important than that of the peripheral auditory system for speech learning in cochlear implant subjects.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/04/20 alle ore 11:03:20