Comparison of sheep and human middle-ear ossicles: anatomy and inertial properties.
Hinge-like rotational motion
Middle-ear ossicles
Moment of inertia
Principal moment of inertia
Sheep
Journal
Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology
ISSN: 1432-1351
Titre abrégé: J Comp Physiol A Neuroethol Sens Neural Behav Physiol
Pays: Germany
ID NLM: 101141792
Informations de publication
Date de publication:
09 2020
09 2020
Historique:
received:
28
01
2020
accepted:
01
06
2020
revised:
25
05
2020
pubmed:
22
6
2020
medline:
9
9
2021
entrez:
22
6
2020
Statut:
ppublish
Résumé
The sheep middle ear has been used in training to prepare physicians to perform surgeries and to test new ways of surgical access. This study aimed to (1) collect anatomical data and inertial properties of the sheep middle-ear ossicles and (2) explore effects of these features on sound transmission, in comparison to those of the human. Characteristic dimensions and inertial properties of the middle-ear ossicles of White-Alpine sheep (n = 11) were measured from high-resolution micro-CT data, and were assessed in comparison with the corresponding values of the human middle ear. The sheep middle-ear ossicles differed from those of human in several ways: anteroinferior orientation of the malleus handle, relatively small size of the incus with a relatively short distance to the lenticular process, a large area of the articular surfaces at the incudostapedial joint, and a relatively small moment of inertia along the anterior-posterior axis. Analysis in this study suggests that structure and orientation of the middle-ear ossicles in the sheep are conducive to an increase in the hinge-like ossicular-lever-action around the anterior-posterior axis. Considering the substantial anatomical differences, outcomes of middle-ear surgeries would presumably be difficult to assess from experiments using the sheep middle ear.
Identifiants
pubmed: 32564138
doi: 10.1007/s00359-020-01430-w
pii: 10.1007/s00359-020-01430-w
pmc: PMC7392934
doi:
Types de publication
Comparative Study
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
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