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Titolo:
Automatic detection of frequency changes depends on auditory stimulus intensity
Autore:
Salo, S; Lang, AH; Aaltonen, O; Lertola, K; Karki, T;
Indirizzi:
Univ Turku, Ctr Cognit Neurosci, FIN-20014 Turku, Finland Univ Turku Turku Finland FIN-20014 it Neurosci, FIN-20014 Turku, Finland Univ Turku, Dept Stat, FIN-20014 Turku, Finland Univ Turku Turku FinlandFIN-20014 , Dept Stat, FIN-20014 Turku, Finland Turku Univ Hosp, Dept Audiol, Turku, Finland Turku Univ Hosp Turku Finland ku Univ Hosp, Dept Audiol, Turku, Finland Turku Univ Hosp, Dept Clin Neurophysiol, Turku, Finland Turku Univ Hosp Turku Finland p, Dept Clin Neurophysiol, Turku, Finland
Titolo Testata:
EAR AND HEARING
fascicolo: 3, volume: 20, anno: 1999,
pagine: 265 - 270
SICI:
0196-0202(199906)20:3<265:ADOFCD>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVENT-RELATED POTENTIALS; MISMATCH NEGATIVITY; DISCRIMINATION; BRAIN; DURATION; CORTEX; MEMORY; PITCH;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Salo, S Univ Turku, Ctr Cognit Neurosci, Lemminkaisenkatu 14-16 A, FIN-20014 Turku, Univ Turku Lemminkaisenkatu 14-16 A Turku Finland FIN-20014 urku,
Citazione:
S. Salo et al., "Automatic detection of frequency changes depends on auditory stimulus intensity", EAR HEAR, 20(3), 1999, pp. 265-270

Abstract

Objective: A cortical cognitive auditory evoked potential, mismatch negativity (MMN), reflects automatic discrimination and echoic memory functions of the auditory system. For this study, we examined whether this potential is dependent on the stimulus intensity. Design: The MMN potentials were recorded from 10 subjects with normal hearing using a sine tone of 1000 Hz as the standard stimulus and a sine tone of 1141 Hz as the deviant stimulus, with probabilities of 90% and 10%, respectively. The intensities were 40, 50, 60, 70, and 80 dB HL for both standard and deviant stimuli in separate blocks. Results: Stimulus intensity had a statistically significant effect on the mean amplitude, rise time parameter, and onset latency of the MMN. Conclusion: Automatic auditory discrimination seems to be dependent on thesound pressure level of the stimuli.

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Documento generato il 26/09/20 alle ore 18:29:41