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The incudopetrosal joint of the human middle ear: a transient morphology in fetuses

dc.contributor.authorYamamoto, Masahito
dc.contributor.authorJi Hyun Kim
dc.contributor.authorZhe‐Wu Jin
dc.contributor.authorKatori, Yukio
dc.contributor.authorMurakami, Gen
dc.contributor.authorRodríguez Vázquez, José Francisco
dc.date.accessioned2024-10-21T16:13:42Z
dc.date.available2024-10-21T16:13:42Z
dc.date.issued2020-03-11
dc.description.abstractIn spite of the amount of research on fetal development of the human middle ear and ear ossicles, there has been no report showing a joint between the short limb of incus and the otic capsule or petrous part of the temporal bone. According to observations of serial histological sections from 65 embryos and fetuses at 7-17 weeks of development, the incudopetrosal joint exhibited a developmental sequence similar to the other joints of ossicles, with an appearance of an interzone followed by a trilaminar configuration at 7-12 weeks, a joint cavitation at 13-15 weeks and development of intraarticular and capsular ligaments at 16-17 weeks. These processes occurred at the same time or slightly later than any other joint. Thus, the joint development might coordinate with vibrating ossicles in utero. The growing short limb of incus appeared to accelerate an expansion of the epitympanic recess of the tympanic cavity. Additional observations of five late-stage fetuses demonstrated the incudopetrosal joint located in the fossa incudis joint changing to syndesmosis. Consequently, a real joint with a cavity existed transiently between the human neurocranium and the first pharyngeal arch derivative (i.e. incus) in contrast to the tympanostapedial joint or syndesmosis between the neurocranium and the second arch derivative. The newly described joint might have an effect on the widely accepted primary jaw concept: the mammalian jaw should thus have been created within the first pharyngeal arch, although the connection with neurocranium by the stapes is of a different origin.
dc.description.departmentDepto. de Anatomía y Embriología
dc.description.facultyFac. de Medicina
dc.description.refereedTRUE
dc.description.statuspub
dc.identifier.citationRodríguez-Vázquez JF, Yamamoto M, Kim JH, Jin ZW, Katori Y, Murakami G. The incudopetrosal joint of the human middle ear: a transient morphology in fetuses. J Anat. 2020 Jul;237(1):176-187. doi: 10.1111/joa.13181. Epub 2020 Mar 11. PMID: 32159229; PMCID: PMC7309281.
dc.identifier.doi10.1111/joa.13181
dc.identifier.issn0021-8782
dc.identifier.issn1469-7580
dc.identifier.officialurlDOI: 10.1111/joa.13181
dc.identifier.relatedurlhttps://onlinelibrary.wiley.com/doi/10.1111/joa.13181
dc.identifier.urihttps://hdl.handle.net/20.500.14352/109187
dc.issue.number1
dc.journal.titleJournal of Anatomy
dc.language.isoeng
dc.page.final187
dc.page.initial176
dc.publisherWiley
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internationalen
dc.rights.accessRightsopen access
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject.cdu611
dc.subject.cdu611.013
dc.subject.keywordHuman fetus
dc.subject.keywordIncudopetrosal joint
dc.subject.keywordMiddle ear
dc.subject.keywordOtic capsule
dc.subject.keywordIncus
dc.subject.ucmAnatomía
dc.subject.unesco2410.02 Anatomía Humana
dc.subject.unesco2410.06 Embriología Humana
dc.titleThe incudopetrosal joint of the human middle ear: a transient morphology in fetuses
dc.typejournal article
dc.type.hasVersionAM
dc.volume.number237
dspace.entity.typePublication
relation.isAuthorOfPublicationb4ed2eb6-cc8d-4563-b65f-318b85bf53d4
relation.isAuthorOfPublication.latestForDiscoveryb4ed2eb6-cc8d-4563-b65f-318b85bf53d4

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