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Ahead of Print
ORIGINAL ARTICLES
Published online: 2020-03-18
Submitted: 2020-02-10
Accepted: 2020-02-26
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Evaluation of the middle ear in water buffalos (Bubalus bubalis) by gross anatomy and cone beam computed tomography

J. Nourinezhad, M. Abedini, M. M. Shamsi, A. Dabbaghi, M. Janeczek
DOI: 10.5603/FM.a2020.0036
·
Pubmed: 32207849

open access

Ahead of Print
ORIGINAL ARTICLES
Published online: 2020-03-18
Submitted: 2020-02-10
Accepted: 2020-02-26

Abstract

Background: The purpose of this study was to provide a description of gross middle ear morphology in water buffalos, augmented with additional data on the osseous structures of middle ear derived from cone-beam computed tomography (CBCT).

Materials and methods: Skulls of 10 young adult male water buffalos were used to examine their middle ear.

Results: Anatomical features noted included the presence of tympanic cells in the tympanic bulla, the location of malleus head and neck, and all of incus in the dorsal epitympanic recess, the oval tympanic membrane (TM), absence of a prominent notch on the articular surface of malleus, positional variations of the lateral process of malleus relative to the muscular process and muscular process relative to the rostral process of malleus, absence of complete coverage of the articular facet of malleus head by incus body, and presence of the lenticular process of incus. In CBCT images, the osseous part of external acoustic meatus, the petrous part of temporal bone and the details of the ossicles were seen, except for stapes.

Conclusions: Although TM, malleus and stapes of water buffalos are similar to those of ox, the incus of water buffalos is more similar to that of goats. The heaviest ossicles among the ruminants studied belonged to water buffalos; the mean length of malleus head and neck, total length and width of incus body as well as length of stapes head were greatest in water buffalos too. The auditory ossicles of water buffalos show ‘transitional type’ morphological characteristics. These features suggest a relatively wide frequency range of hearing, but not one biased towards especially low or especially high frequencies.

Abstract

Background: The purpose of this study was to provide a description of gross middle ear morphology in water buffalos, augmented with additional data on the osseous structures of middle ear derived from cone-beam computed tomography (CBCT).

Materials and methods: Skulls of 10 young adult male water buffalos were used to examine their middle ear.

Results: Anatomical features noted included the presence of tympanic cells in the tympanic bulla, the location of malleus head and neck, and all of incus in the dorsal epitympanic recess, the oval tympanic membrane (TM), absence of a prominent notch on the articular surface of malleus, positional variations of the lateral process of malleus relative to the muscular process and muscular process relative to the rostral process of malleus, absence of complete coverage of the articular facet of malleus head by incus body, and presence of the lenticular process of incus. In CBCT images, the osseous part of external acoustic meatus, the petrous part of temporal bone and the details of the ossicles were seen, except for stapes.

Conclusions: Although TM, malleus and stapes of water buffalos are similar to those of ox, the incus of water buffalos is more similar to that of goats. The heaviest ossicles among the ruminants studied belonged to water buffalos; the mean length of malleus head and neck, total length and width of incus body as well as length of stapes head were greatest in water buffalos too. The auditory ossicles of water buffalos show ‘transitional type’ morphological characteristics. These features suggest a relatively wide frequency range of hearing, but not one biased towards especially low or especially high frequencies.

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Keywords

anatomy, auditory ossicles, cone beam computed tomography, middle ear, morphometry, water buffalo

About this article
Title

Evaluation of the middle ear in water buffalos (Bubalus bubalis) by gross anatomy and cone beam computed tomography

Journal

Folia Morphologica

Issue

Ahead of Print

Published online

2020-03-18

DOI

10.5603/FM.a2020.0036

Pubmed

32207849

Keywords

anatomy
auditory ossicles
cone beam computed tomography
middle ear
morphometry
water buffalo

Authors

J. Nourinezhad
M. Abedini
M. M. Shamsi
A. Dabbaghi
M. Janeczek

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