Establishment of Normative Cochlear and Vestibular Measurements to Aid in the Diagnosis of Inner Ear Malformations

Purcell, Derk D.; Johnson, Jacob; Fischbein, Nancy J.; Lalwani, Anil K.

doi:10.1067/mhn.2003.51

Cited by 87 publications

(120 citation statements)

References 7 publications

Supporting

Mentioning

112

Contrasting

Unclassified

Order By: Relevance

“…2 and are taken from Purcell et al (2003) and Seibel et al (2006). The middle ear impedance, ZME, is the impedance seen from inside the inner ear at the OW.…”

Section: Contribution From the Inner Earmentioning

confidence: 99%

Model predictions for bone conduction perception in the human

Stenfelt

2016

Hearing Research

View full text Add to dashboard Cite

Five different pathways are often suggested as important for bone conducted (BC) sound: (1) sound pressure in the ear canal, (2) inertia of the middle ear ossicles, (3) inertia of the inner ear fluid, (4) compression of the inner ear space, and (5) pressure transmission from the skull interior. The relative importance of these pathways was investigated with an acousticimpedance model of the inner ear. The model incorporated data of BC generated ear canal sound pressure, middle ear ossicle motion, cochlear promontory vibration, and intracranial sound pressure. With BC stimulation at the mastoid, the inner ear inertia dominated the excitation of the cochlea but inner ear compression and middle ear inertia were within 10 dB for almost the entire frequency range of 0.1 to 10 kHz. Ear canal sound pressure gave little contribution at the low and high frequencies, but was around 15 dB below the total contribution at the mid frequencies. Intracranial sound pressure gave responses similar to the others at low frequencies, but decreased with frequency to a level of 55 dB below the total contribution at 10 kHz. When the BC inner ear model was evaluated against AC stimulation at threshold levels, the results were close up to approximately 4 kHz but deviated significantly at higher frequencies. 3 Highlights• A model for BC simulates the contribution from 5 components.• The inner ear compression and inertia and middle ear inertia are most important.• The contribution from intracranial sound pressure is insignificant at higher frequencies.• The model provides similar BM excitation for AC and BC threshold stimulation up to 4 kHz. KeywordsBone conduction, inner ear model, fluid inertia, inner ear compression, middle ear inertia

show abstract

“…2 and are taken from Purcell et al (2003) and Seibel et al (2006). The middle ear impedance, ZME, is the impedance seen from inside the inner ear at the OW.…”

Section: Contribution From the Inner Earmentioning

confidence: 99%

Model predictions for bone conduction perception in the human

Stenfelt

2016

Hearing Research

View full text Add to dashboard Cite

show abstract

“…Unlike most anatomic structures, the inner ear labyrinth does not change in size after birth. 18 Therefore, the establishment of normative data for the dimensions of the inner ear structures by using CT imaging will allow consistent and accurate assessment for patients of all ages. Purcell et al 18,19 demonstrated that standardized measurements of inner ear structures on temporal bone CT scans can complement visual analyses and greatly aid the identification of inner ear malformations.…”

Section: Discussionmentioning

confidence: 99%

“…18 Therefore, the establishment of normative data for the dimensions of the inner ear structures by using CT imaging will allow consistent and accurate assessment for patients of all ages. Purcell et al 18,19 demonstrated that standardized measurements of inner ear structures on temporal bone CT scans can complement visual analyses and greatly aid the identification of inner ear malformations. On the basis of this premise, our prospective evaluation identified 7 different inner ear abnormalities that were statistically significant between individuals with Cornelia de Lange syndrome and those with normal hearing.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Temporal Bone CT Findings in Cornelia de Lange Syndrome

Kim¹,

Kim²,

Lee³

et al. 2007

AJNR Am J Neuroradiol

View full text Add to dashboard Cite

show abstract

“…1A. For the dimensions of the model the vestibule was assumed to be of 6 mm height while the scala vestibuli and scala tympani were 2 mm [8]. The BC motion was assumed to be a longitudinal wave in the petrous part of the temporal bone [11].…”

Section: Model Of Cochlear Motion During Bc Stimulationmentioning

confidence: 99%