Amplitude modulated vestibular evoked myogenic responses: a study of carrier and modulating frequencies

Amplitude modulated vestibular evoked myogenic responses: a study of carrier and modulating frequencies

Author Oliveira, Aline Cabral de Google Scholar
Pereira, Liliane Desgualdo Autor UNIFESP Google Scholar
Colafemina, Jose Fernando Autor UNIFESP Google Scholar
Menezes, Pedro de Lemos Google Scholar
Institution Univ Fed Sergipe
Universidade Federal de São Paulo (UNIFESP)
Estadual Univ Hlth Sci Alagoas
Abstract Conclusion: Responses with greater amplitude were recorded when carrier frequencies were modulated at 37, 40, and 43 Hz. These responses can be recorded even in patients with significant sensorineural hearing loss, from the sternocleidomastoid (SCM) muscle for a 500 Hz tone, 100% modulated at 40 Hz. Objective: To determine the best carrier and modulating frequencies to evoke steady-state myogenic responses. Methods: the present study investigated 156 ears of 78 normal-hearing young adults, with carrier frequencies of 250, 500, and 1000 Hz, modulated at 20, 37, 40, 43, 70, 77, and 80 Hz, with an intensity of 95 dBA. Furthermore, we observed responses evoked by stimulus carrier frequency of 500 Hz, modulated at 40 Hz, with an intensity of 95 dBA in a group of five subjects with severe sensorineural loss. Results: Responses were found for all stimuli studied (p < 0.01). Modulated stimuli at frequencies of 37, 40, and 43 Hz evoked better steady-state vestibular evoked myogenic potential (S-VEMP) (p < 0.05). No statistically significant differences were found between the group of normal hearers and the group of subjects with hearing loss (p = 0.431), for the stimulus used.
Keywords Evoked potentials
vestibule
labyrinth
vestibular nerve
amplitude modulation
evoked responses
electromyography
Language English
Sponsor Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Date 2014-08-01
Published in Acta Oto-laryngologica. London: Informa Healthcare, v. 134, n. 8, p. 796-801, 2014.
ISSN 0001-6489 (Sherpa/Romeo, impact factor)
Publisher Informa Healthcare
Extent 796-801
Origin http://dx.doi.org/10.3109/00016489.2014.909605
Access rights Closed access
Type Article
Web of Science ID WOS:000340137200005
URI http://repositorio.unifesp.br/handle/11600/38072

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