The Effects of Intense Sound on the Non-Auditory Labyrinth

McCabe, Brian F.; Lawrence, Merle

doi:10.3109/00016485809134738

Cited by 70 publications

(28 citation statements)

References 17 publications

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“…With the intensity of more than 130 dBSPL, mechanical injury to the inner ear is inevitable, and individual variation is minimal, leading to irreversible sensorineural HL. At an intensity of 136 to 150 dBSPL to guinea pigs for 20 min, damages to the otolithic membrane and saccular collapse were observed (20). Therefore, the greater the noise intensity, the severer damage on the cochlea and saccule can be anticipated, consistent with our results that those with absent or delayed VEMPs after acoustic trauma had their HL remained unchanged.…”

Section: Discussionsupporting

confidence: 87%

Vestibular Evoked Myogenic Potentials in Acute Acoustic Trauma

Wang

Hsu²,

Young³

2006

Otology &Amp; Neurotology

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Section: Discussionsupporting

confidence: 87%

Vestibular Evoked Myogenic Potentials in Acute Acoustic Trauma

Wang

Hsu²,

Young³

2006

Otology &Amp; Neurotology

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“…Thus, ear plugs combined with earmuffs may be insufficient to protect the saccule from long term gunshot noise exposure. Other animal studies involving guinea pigs exposed to high level noise demonstrate that the pars inferior (cochlea and saccule) is the most susceptible to damage (Hamernik & Henderson, 1984), while the pars superior (semicircular canals and utricle) remains free of damage (McCabe & Lawrence, 1958). This differential sensitivity is attributable to the existence of the membrane limitans which serves as a barrier between the pars superior and inferior (Hara & Kimura, 1993).…”

Section: Impact On Hearing After Long Term Exposure To Gunshot Noisementioning

confidence: 94%

Ten-year longitudinal study of the effect of impulse noise exposure from gunshot on inner ear function

Young

2009

International Journal of Audiology

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This longitudinal study investigated how chronic gunshot noise exposure affects cochlear and saccular function in police officers who engaged in regular target shooting practice using dual protection (ear plugs plus earmuffs) for >10 years. In 1997, 20 male police officers underwent audiometry before and two weeks after shooting. Twelve of the original subjects were re-examined by audiometry coupled with vestibular evoked myogenic potential (VEMP) test in 2007. Significant deterioration of mean hearing thresholds at frequencies of 500 Hz through 4000 Hz was noted ten years later, affecting both ears. However, only the frequencies of 4000 and 6000 Hz on the left ear revealed significant difference in mean hearing thresholds compared with healthy controls. Abnormal VEMP responses were evident in nine police officers (75%), including absent VEMPs 7 and delayed VEMPs 2. In conclusion, deterioration to hearing may occur after long term exposure to gunshots, even when double hearing protection is used. Further study is in progress regarding how to preserve both cochlear and saccular function during long term gunshot exposure.

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“…Early studies showed that the sacculus and the cochlea (pars inferior) can be affected by noise, whereas the utriculus and semicircular canal are not [2,3,13,14] . There is no postmortem study on the sacculus's involvement in NIHL.…”

Section: Discussionmentioning

confidence: 99%

“…The vestibular system, especially sacculus damage caused by noise, emerges by the same mechanism [9,10,13] . the sacculus, inferior vestibular nerve, vestibular nucleus, and cervical muscle activity [3] .…”

Section: Discussionmentioning

confidence: 99%

Analysis of Vestibular Evoked Myogenic Potentials and Electrocochleography in Noise Induced Hearing Loss

Dalğıç

Yılmaz²,

Hıdır³

et al. 2015

Int Adv Otol

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OBJECTIVE:Our objective was to analyze the electrocochleography (ECoG) and cervical vestibular evoked myogenic potential (cVEMP) results of patients with noise-induced hearing loss (NIHL). MATERIALS and METHODS:The study included 20 patients with NIHL. Pure-tone audiometry, tympanic membrane ECoG, and cVEMP were performed on all patients. The patients were divided into two groups based on averaged thresholds at 4, 6, and 8 kHz; whereby, group 1 comprised patients who had a threshold higher than 68.3 dB HL, whereas group 2 comprised patients with a threshold lower than 68.3 dB HL. RESULTS:Group 2 had a significantly higher number of patients with abnormal cVEMP values (63% versus 28%) (p=0.028). There was no significant difference in the incidence of ECoG abnormality between the groups (p>0.05), but there was a significant difference in the incidence of recognizable ECoG potentials between the groups (p<0.05). When only patients with vertigo/dizziness were considered, the group with vertigo and a lower degree of hearing loss (group 2) showed a higher incidence of abnormal cVEMP (p<0.05). CONCLUSION:Although the anatomical proximity of the sacculus to the cochlea leads to the consideration of a common involvement of these structures in NIHL, our results did not support the idea of a common and proportional involvement of the vestibular and auditory systems. Our study shows that saccular involvement is disproportionate to auditory involvement in NIHL.

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The Effects of Intense Sound on the Non-Auditory Labyrinth

Cited by 70 publications

References 17 publications

Vestibular Evoked Myogenic Potentials in Acute Acoustic Trauma

Vestibular Evoked Myogenic Potentials in Acute Acoustic Trauma

Ten-year longitudinal study of the effect of impulse noise exposure from gunshot on inner ear function

Analysis of Vestibular Evoked Myogenic Potentials and Electrocochleography in Noise Induced Hearing Loss

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