Bone conduction experiments in animals – evidence for a non-osseous mechanism

Freeman, Sharon; Sichel, Jean‐Yves; Sohmer, Haim

doi:10.1016/s0378-5955(00)00098-8

Cited by 112 publications

(69 citation statements)

References 22 publications

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“…An alternative and plausible cause relates to changes in the conductive properties of the middle-ear structures due to the presence of middle-ear pathology or effusion which may be evident at 1 kHz. The mechanics of BC hearing and the influence of middle-ear pathology in children and adults are not yet well understood [26].…”

Section: Discussionmentioning

confidence: 99%

Auditory steady-state responses to bone conduction stimuli in children with hearing loss

Swanepoel

Ebrahim

Friedland

et al. 2008

International Journal of Pediatric Otorhinolaryngology

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SummaryObjective: The auditory steady-state response (ASSR) to air-conduction (AC) stimuli has been widely incorporated into audiological test-batteries for the pediatric population. The current understanding of ASSR to bone conduction (BC) stimuli, however, is more limited, especially in the case of infants and children. There are few reports on ASSR thresholds to BC stimuli in infants and young children, and none for infants or children with hearing loss. The objective of this study was to investigate BC ASSR thresholds in young children with normal hearing and various types and degrees of hearing loss. Methods: AC and BC ASSR thresholds are reported for 48 young children (mean age AE SD = 2.8 AE 1.9 years; age range = 0.25-11.5 years; 23 female). Hearing status was classified by assessing all children with a comprehensive test battery including tympanometry, diagnostic distortion-product otoacoustic emissions, click-evoked AC auditory brainstem response, AC and BC ASSR thresholds, and an otologic examination. The subjects were assigned to the categories normal hearing, conductive loss, and sensorineural loss (mild-to-moderate or severe-to-profound), for group analysis. AC and BC ASSR stimuli (carrier frequencies: 0.25-4 kHz; 67-95 Hz modulation rates; 100% amplitude and 10% frequency modulated) were presented using the GSI Audera system. Results: : Minimum levels at which spurious BC ASSR occur were established in the group of children with severe-to-profound sensorineural hearing loss (25, 40, 60, 60 and 60 dB for 0.25, 0.5, 1, 2, and 4 kHz, respectively). Children with normal hearing presented mean (1SD) BC ASSR thresholds of 19 (9), 18 (7), 16 (11), 24 (7), and 26 (8) dB HL at 0.25, 0.5, 1, 2, and 4 kHz, respectively. Significantly lower thresholds ( p < 0.0001) were obtained for 0.25, 0.5 and 1 kHz than for 2 and 4 kHz. At

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Section: Discussionmentioning

confidence: 99%

Auditory steady-state responses to bone conduction stimuli in children with hearing loss

Swanepoel

Ebrahim

Friedland

et al. 2008

International Journal of Pediatric Otorhinolaryngology

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“…In other experiments, acceleration of the bone was measured for stimulation to the forehead, eye, or directly on the brain. While ABR could be clearly recorded for all simulation sites, no acceleration of the bone was measured for stimulation to the eye in human (9) or to the brain in animals (10). By contrast, others have measured vibration on the teeth with stimulation to the eye (11).…”

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confidence: 89%

“…It is controversially discussed in the literature whether or not vibration of the soft tissue is independent of bone vibration. Some reports claim that soft tissue conduction does not involve bone vibration (9,10,25,27). In an animal model, Chordekar et al (25) measured ABR and vibrations of the bony vestibule with an LDV for BC and soft tissue stimulation.…”

Section: E388mentioning

confidence: 99%

Intracranial Pressure and Promontory Vibration With Soft Tissue Stimulation in Cadaveric Human Whole Heads

Röösli

Dobrev

Sim

et al. 2016

Otology &Amp; Neurotology

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HYPOTHESIS: Intracranial pressure and skull vibrations are correlated and depend on the stimulation position and frequency. BACKGROUND: A hearing sensation can be elicited by vibratory stimulation on the skin covered skull, or by stimulation on soft tissue such as the neck. It is not fully understood whether different stimulation sites induce the skull vibrations responsible for the perception or whether other transmission pathways are dominant. The aim of this study was to assess the correlation between intracranial pressure and skull vibration measured on the promontory for stimulation to different sites on the head. METHODS: Measurements were performed on four human cadaver heads. A bone conduction hearing aid was held in place with a 5-Newton steel headband at four locations (mastoid, forehead, eye, and neck). While stimulating in the frequency range of 0.3 to 10 kHz, acceleration of the cochlear promontory was measured with a Laser Doppler Vibrometer, and intracranial pressure at the center of the head with a hydrophone. RESULTS: Promontory acceleration and intracranial pressure was measurable for all stimulation sites. The ratios were comparable between all stimulation sites for frequencies below 2 kHz. CONCLUSION: These findings indicate that both promontory acceleration and intracranial pressure are involved for stimulation on the sites investigated. The transmission pathway of sound energy is comparable for the four stimulation sites. Originally published at: Roosli, Christof; Dobrev, Ivo; Sim, Jae Hoon; Gerig, Rahel; Pfiffner, Flurin; Stenfelt, Stefan; Huber, Alexander M (2016). Intracranial pressure and promontory vibration with soft tissue stimulation in cadaveric human whole heads. Otology Neurotology, 37(9):e384-e390.

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“…However, some authors are Figure 1. Left pinna view -12 months after total ear canal ablation of the opinion that an additional mechanism may play a prominent role in this process (Freeman et al, 2000). Bone conduction experiments in rats and guinea-pigs revealed that the classical bone conduction mechanism should be modified to include a major pathway for cochlear excitation which is non-osseous: when a bone vibrator is applied to the skull, bone vibrations may induce audio-frequency sound pressures in the skull contents (brain and cerebrospinal fluid) which are then communicated by fluid channels to the fluids of the inner ear.…”

Section: Resultsmentioning

confidence: 99%

Bone-conducted brainstem auditory evoked response in a dog with total bilateral ear canal ablation: a case report

Pomianowski¹,

Adamiak²

2010

Vet. Med. - Czech

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Bone conduction experiments in animals – evidence for a non-osseous mechanism

Cited by 112 publications

References 22 publications

Auditory steady-state responses to bone conduction stimuli in children with hearing loss

Auditory steady-state responses to bone conduction stimuli in children with hearing loss

Intracranial Pressure and Promontory Vibration With Soft Tissue Stimulation in Cadaveric Human Whole Heads

Bone-conducted brainstem auditory evoked response in a dog with total bilateral ear canal ablation: a case report

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