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Microanatomy of the human tunnel of Corti structures and cochlear partition-tonotopic variations and transcellular signaling.

التفاصيل البيبلوغرافية
العنوان: Microanatomy of the human tunnel of Corti structures and cochlear partition-tonotopic variations and transcellular signaling.
المؤلفون: Giese D; Department of Surgical Sciences, Otorhinolaryngology and Head and Neck Surgery, Uppsala University, Uppsala, Sweden., Li H; Department of Surgical Sciences, Otorhinolaryngology and Head and Neck Surgery, Uppsala University, Uppsala, Sweden., Liu W; Department of Surgical Sciences, Otorhinolaryngology and Head and Neck Surgery, Uppsala University, Uppsala, Sweden., Staxäng K; The Rudbeck TEM Laboratory, BioVis Platform, Uppsala University, Uppsala, Sweden., Hodik M; The Rudbeck TEM Laboratory, BioVis Platform, Uppsala University, Uppsala, Sweden., Ladak HM; Department of Medical Biophysics, Western University, London, Ontario, Canada.; Department of Electrical and Computer Engineering, Western University, London, Ontario, Canada., Agrawal S; Department of Otolaryngology-Head and Neck Surgery, Western University, London, Ontario, Canada., Schrott-Fischer A; Inner Ear Laboratory, Department of Otorhinolaryngology, Medical University Innsbruck, Innsbruck, Austria., Glueckert R; Inner Ear Laboratory, Department of Otorhinolaryngology, Medical University Innsbruck, Innsbruck, Austria., Rask-Andersen H; Department of Surgical Sciences, Otorhinolaryngology and Head and Neck Surgery, Uppsala University, Uppsala, Sweden.
المصدر: Journal of anatomy [J Anat] 2024 Aug; Vol. 245 (2), pp. 271-288. Date of Electronic Publication: 2024 Apr 13.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: Blackwell Publishing Country of Publication: England NLM ID: 0137162 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1469-7580 (Electronic) Linking ISSN: 00218782 NLM ISO Abbreviation: J Anat Subsets: MEDLINE
أسماء مطبوعة: Publication: 2002- : Oxford : Blackwell Publishing
Original Publication: London, Cambridge Univ. Press [etc.].
مواضيع طبية MeSH: Cochlea*/anatomy & histology , Cochlea*/physiology , Organ of Corti*/anatomy & histology , Organ of Corti*/physiology, Humans ; Microscopy, Electron, Scanning ; Microscopy, Electron, Transmission ; Signal Transduction/physiology ; Basilar Membrane/anatomy & histology ; Basilar Membrane/physiology
مستخلص: Auditory sensitivity and frequency resolution depend on the optimal transfer of sound-induced vibrations from the basilar membrane (BM) to the inner hair cells (IHCs), the principal auditory receptors. There remains a paucity of information on how this is accomplished along the frequency range in the human cochlea. Most of the current knowledge is derived either from animal experiments or human tissue processed after death, offering limited structural preservation and optical resolution. In our study, we analyzed the cytoarchitecture of the human cochlear partition at different frequency locations using high-resolution microscopy of uniquely preserved normal human tissue. The results may have clinical implications and increase our understanding of how frequency-dependent acoustic vibrations are carried to human IHCs. A 1-micron-thick plastic-embedded section (mid-modiolar) from a normal human cochlea uniquely preserved at lateral skull base surgery was analyzed using light and transmission electron microscopy (LM, TEM). Frequency locations were estimated using synchrotron radiation phase-contrast imaging (SR-PCI). Archival human tissue prepared for scanning electron microscopy (SEM) and super-resolution structured illumination microscopy (SR-SIM) were also used and compared in this study. Microscopy demonstrated great variations in the dimension and architecture of the human cochlear partition along the frequency range. Pillar cell geometry was closely regulated and depended on the reticular lamina slope and tympanic lip angle. A type II collagen-expressing lamina extended medially from the tympanic lip under the inner sulcus, here named "accessory basilar membrane." It was linked to the tympanic lip and inner pillar foot, and it may contribute to the overall compliance of the cochlear partition. Based on the findings, we speculate on the remarkable microanatomic inflections and geometric relationships which relay different sound-induced vibrations to the IHCs, including their relevance for the evolution of human speech reception and electric stimulation with auditory implants. The inner pillar transcellular microtubule/actin system's role of directly converting vibration energy to the IHC cuticular plate and ciliary bundle is highlighted.
(© 2024 The Authors. Journal of Anatomy published by John Wiley & Sons Ltd on behalf of Anatomical Society.)
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معلومات مُعتمدة: 2022-03339 The Swedish Research Council; The Tysta Skolan Foundation; The Swedish Deafness Foundation; MED-EL Elektromedizinische Geräte GmbH, Innsbruck, Austria; The Canada Foundation for Innovation (CFI); The Natural Sciences and Engineering Research Council (NSERC); The National Research Council (NRC); The Canadian Institutes of Health Research (CIHR); The Government of Saskatchewan; University od Saskathewan
فهرسة مساهمة: Keywords: cochlea; human; microanatomy; microtubules; synchrotron radiation phase‐contrast imaging
تواريخ الأحداث: Date Created: 20240413 Date Completed: 20240720 Latest Revision: 20240722
رمز التحديث: 20240722
مُعرف محوري في PubMed: PMC11259753
DOI: 10.1111/joa.14045
PMID: 38613211
قاعدة البيانات: MEDLINE
الوصف
تدمد:1469-7580
DOI:10.1111/joa.14045