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Titre : | Response properties of the human frequency-following response (FFR) to speech and non-speech sounds: level dependence, adaptation and phase-locking limits (2018) |
Auteurs : | Gavin Bidelman |
Type de document : | Article |
Dans : | International Journal of Audiology IJA (Vol. 57, n°1-12, January-December 2018) |
Article en page(s) : | p. 665-672 |
Langues: | Anglais |
Résumé : |
Objective: The frequency-following response (FFR) is a neurophonic potential used to assess auditory neural encoding at subcortical stages. Despite the FFRs empirical and clinical utility, basic response properties of this evoked potential remain undefined. Design: We measured FFRs to speech and nonspeech (pure tone, chirp sweeps) stimuli to quantify three key properties of this potential: level-dependence (I/O functions), adaptation and the upper limit of neural phase-locking. Study sample: n = 13 normal-hearing listeners. Results: I/O functions showed FFR amplitude increased with increasing stimulus presentation level between 25 and 80 dB SPL; FFR growth was steeper for tones than speech when measured at the same frequency. FFR latency decreased 45 ms with decreasing presentation level from 25 and 80 dB SPL but responses were ∼2 ms earlier for speech than tones. FFR amplitudes showed a 50% reduction over 6 min of recording with the strongest adaptation in the first 60 s (250 trials). Estimates of neural synchronisation revealed FFRs contained measurable phase-locking up to ∼12001300 Hz, slightly higher than the single neuron limit reported in animal models. Conclusions: Findings detail fundamental response properties that will be important for using FFRs in clinical and empirical applications. |
Accès : | Contactez la bibliothèque d'Ixelles si le lien vers la ressource électronique ne fonctionne plus |
Disponible en ligne : | Oui |
En ligne : | https://login.ezproxy.vinci.be/login?url=https://www.tandfonline.com/doi/full/10.1080/14992027.2018.1470338 |
Exemplaires (1)
Cote | Support | Localisation | Section | Disponibilité |
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International journal of audiology IJA. Vol. 57, n°1-12 (January-December 2018) | Périodique papier | Ixelles | Rez | Consultation sur place uniquement Exclu du prêt |