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Titolo:
Comparing signal to noise ratios of amplitude modulation following responses from four EEG derivations in awake normally hearing adults
Autore:
van der Reijden, CS; Mens, LHM; Snik, AFM;
Indirizzi:
Univ Nijmegen, Med Ctr, Dept Otorhinolaryngol, NL-6500 HB Nijmegen, Netherlands Univ Nijmegen Nijmegen Netherlands NL-6500 HB 0 HB Nijmegen, Netherlands
Titolo Testata:
AUDIOLOGY
fascicolo: 4, volume: 40, anno: 2001,
pagine: 202 - 207
SICI:
0020-6091(200107/08)40:4<202:CSTNRO>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
STEADY-STATE RESPONSES; BRAIN-STEM RESPONSE; EVOKED-POTENTIALS; YOUNG-CHILDREN; THRESHOLDS; FREQUENCY; COHERENCE; MASTER; TONES; HZ;
Keywords:
amplitude modulation following response (AMFR); steady-state evoked potential (SSEP); hearing threshold; signal; noise; EEG derivation; electrode position;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: van der Reijden, CS Univ Nijmegen, Med Ctr, Dept Otorhinolaryngol, POB 9101, NL-6500 HB Nijmegen, Netherlands Univ Nijmegen POB 9101 Nijmegen Netherlands NL-6500 HB
Citazione:
C.S. van der Reijden et al., "Comparing signal to noise ratios of amplitude modulation following responses from four EEG derivations in awake normally hearing adults", AUDIOLOGY, 40(4), 2001, pp. 202-207

Abstract

Amplitude modulation following responses (AMFR) or steady-state evoked potentials (SSEPs) can be used for the objective and frequency-specific estimation of hearing thresholds in awake and sleeping subjects. To be useful as a clinical tool, a high signal to noise ratio (SNR) is required for a minimal testing time. Four EEG derivations were compared in six relaxed. cooperative awake normally hearing adults to compare the SNRs. Stimuli comprised aI kHz carrier wave. amplitude modulated at 39 Hz and 90 Hz. They were presented for about 4.4 min in one ear at a level slightly above the behavioural threshold (10 dB SL). In the 39 Hz condition, the SNRs from the differentderivations did not differ significantly. However. in the 90 Hz condition one novel derivation (Cz-inion with ground at Pz) yielded a significantly lower noise level, about 60 per cent of the noise level of the other derivations. The SNR of this derivation was about 50 per cent larger than from other derivations. Such an increase of the SNR implies that testing time is reduced by about 56 per cent as compared to conventional derivations in thesesubjects.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 06:57:56