Amplitude modulation following responses in awake and sleeping humans--a comparison for 40 Hz and 80 Hz modulation frequency

Scandinavian Audiology. Supplementum
J PetheT Hocke

Abstract

There have been several studies, which suggest that the amplitude of amplitude modulation following responses (AMFR) is correlated to the state of vigilance, similar to the 40 Hz event-related potentials. The aim of the present study was to compare the dependency of the AMFR-amplitude from the state of sleep for 40 Hz and 80 Hz modulation frequency. Eight normal hearing adults were investigated during natural and drug-induced sleep. The stimuli used were sinusoidally amplitude-modulated tones of 1 kHz carried frequency and 40 or 80 Hz modulation frequency at 60 dB nH stimulation level. For 40 Hz modulation frequency an increase of EEG-activity in the Delta-and Theta-band during periods of sleep correlates significantly with a decreased AMFR-amplitude whereas for 80 Hz no significant relation between stage of sleep and AMFR-amplitude could be found. The results suggest that in audiological use of 40 Hz-AMFR the state of vigilance should be monitored and stabilized at a high level.

References

Nov 1, 1990·Anesthesia and Analgesia·G Plourde, T W Picton
May 1, 1985·Ear and Hearing·R D LindenT W Picton
Dec 19, 1998·The Journal of the Acoustical Society of America·R A Dobie, M J Wilson

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Citations

Jun 1, 2008·Indian Journal of Otolaryngology and Head and Neck Surgery : Official Publication of the Association of Otolaryngologists of India·Kaushlendra KumarJayashree S Bhat
Mar 13, 2014·International Journal of Pediatric Otorhinolaryngology·Roland MühlerJesko L Verhey
Sep 2, 2015·Journal of the Association for Research in Otolaryngology : JARO·Luke A ShaheenM Charles Liberman
Oct 2, 2004·International Journal of Audiology·Joachim PetheHellmut von Specht
Jun 7, 2003·International Journal of Audiology·Terence W PictonDavid Purcell
Mar 4, 2021·Journal of Neurophysiology·Anita M MepaniStéphane F Maison

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