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Bryant JP, Chandrashekhar V, Cappadona AJ, Lookian PP, Chandrashekhar V, Donahue DR, Munasinghe JB, Kim HJ, Vortmeyer AO, Heiss JD, Zhuang Z, Rosenblum JS. Multimodal Atlas of the Murine Inner Ear: From Embryo to Adult. Front Neurol 2021; 12:699674. [PMID: 34335453 PMCID: PMC8319626 DOI: 10.3389/fneur.2021.699674] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 06/22/2021] [Indexed: 12/02/2022] Open
Abstract
The inner ear is a complex organ housed within the petrous bone of the skull. Its intimate relationship with the brain enables the transmission of auditory and vestibular signals via cranial nerves. Development of this structure from neural crest begins in utero and continues into early adulthood. However, the anatomy of the murine inner ear has only been well-characterized from early embryogenesis to post-natal day 6. Inner ear and skull base development continue into the post-natal period in mice and early adulthood in humans. Traditional methods used to evaluate the inner ear in animal models, such as histologic sectioning or paint-fill and corrosion, cannot visualize this complex anatomy in situ. Further, as the petrous bone ossifies in the postnatal period, these traditional techniques become increasingly difficult. Advances in modern imaging, including high resolution Micro-CT and MRI, now allow for 3D visualization of the in situ anatomy of organs such as the inner ear. Here, we present a longitudinal atlas of the murine inner ear using high resolution ex vivo Micro-CT and MRI.
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Affiliation(s)
- Jean-Paul Bryant
- Surgical Neurology Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, United States
| | - Vikram Chandrashekhar
- Neuro-Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD, United States.,Center for Imaging Science, Johns Hopkins University, Baltimore, MD, United States
| | - Anthony J Cappadona
- Neuro-Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD, United States
| | - Pashayar P Lookian
- Surgical Neurology Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, United States.,Neuro-Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD, United States
| | | | - Danielle R Donahue
- Mouse Imaging Facility, National Institute of Neurological Disorders and Stroke, Bethesda, MD, United States
| | - Jeeva B Munasinghe
- Mouse Imaging Facility, National Institute of Neurological Disorders and Stroke, Bethesda, MD, United States
| | - H Jeffrey Kim
- Department of Otolaryngology, Georgetown University School of Medicine, Washington, DC, United States.,Office of Clinical Director, National Institute on Deafness and Other Communication Disorders, Bethesda, MD, United States
| | - Alexander O Vortmeyer
- Department of Pathology, Indiana University School of Medicine, Indianapolis, IN, United States
| | - John D Heiss
- Surgical Neurology Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, United States
| | - Zhengping Zhuang
- Neuro-Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD, United States
| | - Jared S Rosenblum
- Surgical Neurology Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, United States.,Neuro-Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD, United States
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Park E, Lee G, Jung HH, Im GJ. Analysis of Inner Ear Anomalies in Unilateral Congenital Aural Atresia Combined With Microtia. Clin Exp Otorhinolaryngol 2018; 12:176-180. [PMID: 30403837 PMCID: PMC6453793 DOI: 10.21053/ceo.2018.00857] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 09/14/2018] [Indexed: 11/22/2022] Open
Abstract
Objectives The aim of this study was to analyze the incidence of inner ear anomalies in patients with unilateral congenital aural atresia (CAA) combined with microtia. Methods We retrospectively reviewed 61 patients with unilateral CAA combined with microtia who underwent high-resolution temporal bone computed tomography (TBCT) and hearing examination. Inner ear anomalies were analyzed using TBCT and evaluated according to the Jahrsdoerfer grading system, Marx classification, and extent of inferior displacement of the mastoid tegmen. Results Inner ear anomalies were observed in 14 patients (23.0%). Lateral semicircular canal (LSCC) dysplasia was the most common inner ear anomaly, with an incidence of 16.4%. The incidence was significantly higher on the pathologic side than on the unaffected side (P=0.002). All vascular anomalies were observed in the high-riding jugular bulb, with an incidence of 24.6%. The incidence was significantly higher on the pathologic side than on the unaffected side (P<0.001). LSCC dysplasia was significantly more common in patients with a lower Jahrsdoerfer score (odds ratio, 0.66; P=0.004). Conclusion The incidence of inner ear anomalies was relatively high in patients with unilateral CAA combined with microtia; LSCC dysplasia was the most common anomaly and the probability of coexistence was higher in patients with a lower Jahrsdoerfer score.
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Affiliation(s)
- Euyhyun Park
- Department of Otolaryngology-Head and Neck Surgery, Korea University College of Medicine, Seoul, Korea
| | - Gijeong Lee
- Department of Otolaryngology-Head and Neck Surgery, Korea University College of Medicine, Seoul, Korea
| | - Hak Hyun Jung
- Department of Otolaryngology-Head and Neck Surgery, Korea University College of Medicine, Seoul, Korea
| | - Gi Jung Im
- Department of Otolaryngology-Head and Neck Surgery, Korea University College of Medicine, Seoul, Korea
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Jugular dominance is unrelated to isolated unilateral congenital aural atresia in children. Int J Pediatr Otorhinolaryngol 2018; 110:118-122. [PMID: 29859571 DOI: 10.1016/j.ijporl.2018.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 04/29/2018] [Accepted: 05/03/2018] [Indexed: 11/21/2022]
Abstract
OBJECTIVES The right jugular foramen is usually larger than the left in Homo sapiens, but it is unknown if right-sided jugular dominance is also more common amongst those with unilateral congenital aural atresia. We hypothesized that the dominant (i.e. larger) jugular foramen in children with isolated, non-syndromic, unilateral congenital aural atresia would be contralateral to the atretic ear. METHODS We reviewed high-resolution computed tomography scans of the temporal bones of 70 children with isolated, non-syndromic, unilateral congenital aural atresia. Images were viewed in the transverse (axial) plane by a board-certified neuroradiologist and a board-certified otolaryngologist. Consensus opinion was recorded. Multiple logistic regression was used to assess the impact of age, sex, and side of aural atresia on jugular dominance. RESULTS Jugular foramen dominance was not associated with the side of aural atresia (P = 0.20), age (P = 0.50) or sex (P = 0.76). Right-sided jugular dominance (46/70, 65.7%) was more common in both left- and right-sided unilateral aural atresia (P = 0.004). CONCLUSIONS The side of jugular foramen dominance is not associated with the side of aural atresia in children with isolated, non-syndromic, unilateral congenital aural atresia. Right-sided jugular dominance is more common irrespective of unilateral aural atresia.
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