Anatomy of the fundus of the internal acoustic meatus — micro-computed tomography study

Kozerska, Magdalena; Skrzat, Janusz

doi:10.5603/fm.2015.0053

Cited by 12 publications

(12 citation statements)

References 13 publications

(15 reference statements)

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“…SR analyses, using a maximal intensity projection, occasionally showed an identifiable vessel. This is in concordance with Kozerska and Skrzat ( 51 ), who found that it may relay a branch or the AVA. It was earlier shown that selective obstruction of the AVA may be associated with sudden vertigo ( 52 ) followed by positional vertigo.…”

Section: Discussionsupporting

confidence: 92%

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Human inner ear blood supply revisited: the Uppsala collection of temporal bone—an international resource of education and collaboration

Mei

Atturo

Wadin

et al. 2018

Upsala Journal of Medical Sciences

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Background: The Uppsala collection of human temporal bones and molds is a unique resource for education and international research collaboration. Micro-computerized tomography (micro-CT) and synchrotron imaging are used to investigate the complex anatomy of the inner ear. Impaired microcirculation is etiologically linked to various inner ear disorders, and recent developments in inner ear surgery promote examination of the vascular system. Here, for the first time, we present three-dimensional (3D) data from investigations of the major vascular pathways and corresponding bone channels.Methods: We used the archival Uppsala collection of temporal bones and molds consisting of 324 inner ear casts and 113 macerated temporal bones. Micro-CT was used to investigate vascular bone channels, and 26 fresh human temporal bones underwent synchrotron radiation phase contrast imaging (SR-PCI). Data were processed by volume-rendering software to create 3D reconstructions allowing orthogonal sectioning, cropping, and soft tissue analyses.Results: Micro-CT with 3D rendering was superior in reproducing the anatomy of the vascular bone channels, while SR-PCI replicated soft tissues. Arterial bone channels were traced from scala vestibuli (SV) arterioles to the fundus, cochlea, and vestibular apparatus. Drainage routes along the aqueducts were examined.Conclusion: Human inner ear vessels are difficult to study due to the adjoining hard bone. Micro-CT and SR-PCI with 3D reconstructions revealed large portions of the micro-vascular system in un-decalcified specimens. The results increase our understanding of the organization of the vascular system in humans and how altered microcirculation may relate to inner ear disorders. The findings may also have surgical implications.

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Section: Discussionsupporting

confidence: 92%

“…We recently identified a foramen in the TC ( 46 ). Kozerska and Skrzat ( 51 ) identified this foramen only in infant skulls and suggested that it transmits blood vessels to the vestibule or the superior vestibular nerve (SVN) via the AVA. They could not rule out that it may contain nerve fibers.…”

Section: Discussionmentioning

confidence: 99%

Human inner ear blood supply revisited: the Uppsala collection of temporal bone—an international resource of education and collaboration

Mei

Atturo

Wadin

et al. 2018

Upsala Journal of Medical Sciences

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“…However, vessels could be identified nearer the fundus region. A bone channel was described in the lateral part of the TC (Kozerska & Skrzat, ; Schart‐Moren et al. 2017b).…”

Section: Discussionmentioning

confidence: 99%

“…However, vessels could be identified nearer the fundus region. A bone channel was described in the lateral part of the TC (Kozerska & Skrzat, 2015;Schart-Moren et al 2017b). It was thought to transmit blood vessels to the vestibule (V) or nerve branch and to the otolith organs.…”

Section: Nerve Anastomosesmentioning

confidence: 99%

Three‐dimensional imaging of the human internal acoustic canal and arachnoid cistern: a synchrotron study with clinical implications

Mei

Schart-Morén

et al. 2018

Journal of Anatomy

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A thorough knowledge of the gross and micro‐anatomy of the human internal acoustic canal (IAC) is essential in vestibular schwannoma removal, cochlear implantation (CI) surgery, vestibular nerve section, and decompression procedures. Here, we analyzed the acoustic‐facial cistern of the human IAC, including nerves and anastomoses using synchrotron phase contrast imaging (SR‐PCI). A total of 26 fresh human temporal bones underwent SR‐PCI. Data were processed using volume‐rendering software to create three‐dimensional (3D) reconstructions allowing soft tissue analyses, orthogonal sectioning, and cropping. A scalar opacity mapping tool was used to enhance tissue surface borders, and anatomical structures were color‐labeled for improved 3D comprehension of the soft tissues. SR‐PCI reproduced, for the first time, the variable 3D anatomy of the human IAC, including cranial nerve complexes, anastomoses, and arachnoid membrane invagination (acoustic‐facial cistern; an extension of the cerebellopontine cistern) in unprocessed, un‐decalcified specimens. An unrecognized system of arachnoid pillars and trabeculae was found to extend between the arachnoid and cranial nerves. We confirmed earlier findings that intra‐meatal vestibular schwannoma may grow unseparated from adjacent nerves without duplication of the arachnoid layers. The arachnoid pillars may support and stabilize cranial nerves in the IAC and could also play a role in local fluid hydrodynamics.

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“…The most important reason for this complexity is that the regions of anatomical structures should be well known [2,10,19]. Especially the detail created by µCT in bone tissue is used to distinguish between anatomical structures [5,11]. The quality of education can be increased, more realistic observations can be made, patient-specific approaches can be applied and new plans can be created with these 3D models [6,10,18,23].…”

Section: Introductionmentioning

confidence: 99%

Volumetric analysis of the cranial and nasal cavity from micro-computed tomography scans in the rabbit

et al. 2020

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Background:The aim of the study was to estimate the volume values of the cranial cavity and nasal cavity structures and to compare the efficiency of manual segmentation of three-dimensional reconstruction and Cavalieri's principle (CP) methodologies. Materials and methods: Volume values of the cranial cavity, maxillary sinus (MS), dorsal conchal sinus (DCS), dorsal nasal meatus (DNM), middle nasal meatus (MNM), ventral nasal meatus (VNM), ventral nasal concha (VNC), middle nasal concha (MNC)and nasal vestibule (NV) were estimated with manual segmentation and CP from micro-computed tomography images in 5 male New Zealand white rabbits. Volume measurements and elapsed time were compared with each other. Three-dimensional reconstruction models of nasal and cranial cavity structures were created. Results: There was a statistically significant difference between methods of the MS, DCS, DNM, MNM, VNM, VNC, and MNC volume measurements. Additionally, there was a statistically significant difference between the volumetric analysis time period of the methods and CP was found much shorter than manual segmentation. Conclusions: Realistic results were achieved in a short time with the CP among the stereology methods. It is thought that these image and quantitative data results can be used for modelling, toxicology and pathology studies such as acute and chronic rhinitis or rhino sinusitis as well as a good understanding of the relationship of the anatomical structures in the nasal cavity.

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Anatomy of the fundus of the internal acoustic meatus — micro-computed tomography study

Abstract: The aim of this paper was to present micro-computed tomography (micro-CT) high resolution images of the fundus of internal acoustic meatus (FIAM) (Folia Morphol 2015; 74, 3: 352-358)

Cited by 12 publications

References 13 publications

Human inner ear blood supply revisited: the Uppsala collection of temporal bone—an international resource of education and collaboration

Human inner ear blood supply revisited: the Uppsala collection of temporal bone—an international resource of education and collaboration

Three‐dimensional imaging of the human internal acoustic canal and arachnoid cistern: a synchrotron study with clinical implications

Volumetric analysis of the cranial and nasal cavity from micro-computed tomography scans in the rabbit

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