Definition and research guide
This page combines a MeSH definition, publication statistics and selected research abstracts. It is a starting point for reading the literature, not a medical textbook or a systematic evidence review.
Content available: 4 complete abstracts (590 words), 10 references. Full article text is not stored or reproduced here; follow the PMID, DOI or PMC links to read the original sources and their access terms.
Definition
The spiral epithelium containing sensory auditory hair cells and supporting cells in the cochlea. Organ of Corti, situated on the basilar membrane and overlaid by a gelatinous tectorial membrane, converts sound-induced mechanical waves to neural impulses to the brain.
Definition: NLM Medical Subject Headings (MeSH) scope note (Public domain (U.S. National Library of Medicine); attribution requested). View the MeSH record.
Also known as: Corti Organ; Corti's Organ; Cortis Organ; Organ, Corti's; Spiral Organ; Organ, Spiral; Organs, Spiral; Spiral Organs.
Where it fits in the MeSH classification
- Broader topics
- Cochlea
- Narrower topics
- Hair Cells, Auditory; Labyrinth Supporting Cells
Related concepts
- Epithelium
- Auditory Hair Cells
- Basilar Membrane
- Tectorial Membrane
Research landscape
PubMed indexes 12,588 records tagged with the MeSH heading “Organ of Corti” (counts retrieved 2026-10-31). 1,522 of them (12.1%) were published from 2020 onward, and the busiest period so far is through 1999 with 5,399 records.
Reviews account for 1,044 records (8.3%) and meta-analyses for 4. Randomized controlled trials number 7 (0.1%) as a share of all records on the topic. Randomized trials make up only a small share of this literature, so much of what is known comes from laboratory, observational or descriptive work.
Show the data
| Period | Records |
|---|---|
| through 1999 | 5,399 |
| 2000-2009 | 2,824 |
| 2010-2019 | 2,843 |
| 2020 onward | 1,522 |
Publication-type chart data
| Type | Records | Share |
|---|---|---|
| Reviews | 1,044 | 8.3% |
| Meta-analyses | 4 | 0.0% |
| Randomized controlled trials | 7 | 0.1% |
Method: PubMed query "Organ of Corti"[MeSH Terms] with publication-type and date filters, retrieved 2026-10-31.
Reading the evidence in anatomy and physiology
Anatomy describes how body structures are built and physiology describes how they normally work, so most findings here are descriptive or mechanistic rather than evidence about treatment. Much of what is known comes from dissection, imaging, tissue studies and experiments in animals, and measurements in healthy volunteers can differ from those in people with disease or at different ages. Normal ranges vary between individuals and populations. Check whether a result was measured in people or in another species, the age and health of the participants, and the method used.
Evidence from open-access studies
These open-access studies come from PubMed’s best-match results for this heading (papers whose main topic it is), ranked here by citation count, with one recent addition. Each abstract is reproduced in full under its recorded open licence so that you can read the authors’ own words. They illustrate the literature; they are not a systematic summary of it. Citation counts measure attention, not reliability or clinical benefit.
| Study / authors | Year | Source label / design | Europe PMC citations | Licence / source |
|---|---|---|---|---|
| Characterization of the development of the mouse cochlear epithelium at the single cell level | 2020 | Research article Design not recorded in structured metadata | 280 | cc by PMID 32404924 · DOI · PMC7221106 |
| Renewed proliferation in adult mouse cochlea and regeneration of hair cells | 2019 | Research article Design not recorded in structured metadata | 98 | cc by PMID 31797926 · DOI · PMC6892913 |
| Myosin-VIIa is expressed in multiple isoforms and essential for tensioning the hair cell mechanotransduction complex | 2020 | Research article Design not recorded in structured metadata | 86 | cc by PMID 32350269 · DOI · PMC7190839 |
| NMNAT1 Activates Autophagy to Delay D-Galactose-Induced Aging in Cochlear Hair Cells | 2026 | Research article Design not recorded in structured metadata | 2 | cc by PMID 41521645 · DOI · PMC12793064 |
Characterization of the development of the mouse cochlear epithelium at the single cell level [1]
Abstract reading summary — source excerpts
- Opening excerpt
- Mammalian hearing requires the development of the organ of Corti, a sensory epithelium comprising unique cell types.
- Closing excerpt
- These results provide insights regarding cochlear development and demonstrate the potential value and application of this data set.
- Interpretation limits
- Verbatim excerpts from the authors’ abstract; the closing excerpt may describe a finding, limitation or recommendation. Design, population, effect size and uncertainty have not been independently extracted or appraised. Read the complete abstract and linked paper before interpreting the findings.
Read complete abstract (148 words)
Mammalian hearing requires the development of the organ of Corti, a sensory epithelium comprising unique cell types. The limited number of each of these cell types, combined with their close proximity, has prevented characterization of individual cell types and/or their developmental progression. To examine cochlear development more closely, we transcriptionally profile approximately 30,000 isolated mouse cochlear cells collected at four developmental time points. Here we report on the analysis of those cells including the identification of both known and unknown cell types. Trajectory analysis for OHCs indicates four phases of gene expression while fate mapping of progenitor cells suggests that OHCs and their surrounding supporting cells arise from a distinct (lateral) progenitor pool. Tgfβr1 is identified as being expressed in lateral progenitor cells and a Tgfβr1 antagonist inhibits OHC development. These results provide insights regarding cochlear development and demonstrate the potential value and application of this data set.
Abstract reproduced from the open-access article under the recorded cc by licence; © the authors. PMID 32404924 · DOI · PMC7221106
Renewed proliferation in adult mouse cochlea and regeneration of hair cells [2]
Abstract reading summary — source excerpts
- Opening excerpt
- The adult mammalian inner ear lacks the capacity to divide or regenerate.
- Closing excerpt
- These regenerated hair cell-like cells take up the styryl dye FM1-43 and are likely to form connections with adult spiral ganglion neurons, supporting that Myc and Notch1 co-activation is sufficient to reprogram fully mature supporting cells to proliferate and regenerate hair cell-like cells in adult mammalian auditory organs.
- Interpretation limits
- Verbatim excerpts from the authors’ abstract; the closing excerpt may describe a finding, limitation or recommendation. Design, population, effect size and uncertainty have not been independently extracted or appraised. Read the complete abstract and linked paper before interpreting the findings.
Read complete abstract (149 words)
The adult mammalian inner ear lacks the capacity to divide or regenerate. Damage to inner ear generally leads to permanent hearing loss in humans. Here, we present that reprogramming of the adult inner ear induces renewed proliferation and regeneration of inner ear cell types. Co-activation of cell cycle activator Myc and inner ear progenitor gene Notch1 induces robust proliferation of diverse adult cochlear sensory epithelial cell types. Transient MYC and NOTCH activities enable adult supporting cells to respond to transcription factor Atoh1 and efficiently transdifferentiate into hair cell-like cells. Furthermore, we uncover that mTOR pathway participates in MYC/NOTCH-mediated proliferation and regeneration. These regenerated hair cell-like cells take up the styryl dye FM1-43 and are likely to form connections with adult spiral ganglion neurons, supporting that Myc and Notch1 co-activation is sufficient to reprogram fully mature supporting cells to proliferate and regenerate hair cell-like cells in adult mammalian auditory organs.
Abstract reproduced from the open-access article under the recorded cc by licence; © the authors. PMID 31797926 · DOI · PMC6892913
Myosin-VIIa is expressed in multiple isoforms and essential for tensioning the hair cell mechanotransduction complex [3]
Abstract reading summary — source excerpts
- Opening excerpt
- Mutations in myosin-VIIa (MYO7A) cause Usher syndrome type 1, characterized by combined deafness and blindness.
- Closing excerpt
- Taken together, our study reveals an unexpected isoform diversity of MYO7A expression in the cochlea and highlights MYO7A's essential role in tensioning the hair cell MET complex.
- Interpretation limits
- Verbatim excerpts from the authors’ abstract; the closing excerpt may describe a finding, limitation or recommendation. Design, population, effect size and uncertainty have not been independently extracted or appraised. Read the complete abstract and linked paper before interpreting the findings.
Read complete abstract (149 words)
Mutations in myosin-VIIa (MYO7A) cause Usher syndrome type 1, characterized by combined deafness and blindness. MYO7A is proposed to function as a motor that tensions the hair cell mechanotransduction (MET) complex, but conclusive evidence is lacking. Here we report that multiple MYO7A isoforms are expressed in the mouse cochlea. In mice with a specific deletion of the canonical isoform (Myo7a-ΔC mouse), MYO7A is severely diminished in inner hair cells (IHCs), while expression in outer hair cells is affected tonotopically. IHCs of Myo7a-ΔC mice undergo normal development, but exhibit reduced resting open probability and slowed onset of MET currents, consistent with MYO7A's proposed role in tensioning the tip link. Mature IHCs of Myo7a-ΔC mice degenerate over time, giving rise to progressive hearing loss. Taken together, our study reveals an unexpected isoform diversity of MYO7A expression in the cochlea and highlights MYO7A's essential role in tensioning the hair cell MET complex.
Abstract reproduced from the open-access article under the recorded cc by licence; © the authors. PMID 32350269 · DOI · PMC7190839
NMNAT1 Activates Autophagy to Delay D-Galactose-Induced Aging in Cochlear Hair Cells [4]
Abstract reading summary — source excerpts
- Opening excerpt
- With an aging population, the incidence of age-related hearing loss (ARHL) continues to increase.
- Closing excerpt
- These findings offer novel insights into the association between autophagy and metabolism during aging and highlight NMNAT1 as a potential therapeutic target for the prevention and treatment of ARHL.
- Interpretation limits
- Verbatim excerpts from the authors’ abstract; the closing excerpt may describe a finding, limitation or recommendation. Design, population, effect size and uncertainty have not been independently extracted or appraised. Read the complete abstract and linked paper before interpreting the findings.
Read complete abstract (144 words)
With an aging population, the incidence of age-related hearing loss (ARHL) continues to increase. Aging cells exhibit reduced nicotinamide adenine dinucleotide (NAD+) levels and impaired autophagy; however, the mechanisms underlying these processes remain largely unclear. In our study, we assessed the role of nicotinamide nucleotide adenylate transferase 1 (NMNAT1) in cochlear hair cell aging using D-galactose (D-gal)-induced aging HEI-OC1 cells and cochlear explants. We observed a significant reduction in NMNAT1 expression in HEI-OC1 cells and cochlear hair cells treated with D-gal. Notably, NMNAT1 overexpression activated autophagy and decelerated hair cell aging. Metabolomic analysis revealed a dysregulated tricarboxylic acid cycle in Nmnat1-knockout cells, indicating that NMNAT1 regulates autophagy and metabolic pathways that affect hair cell aging. These findings offer novel insights into the association between autophagy and metabolism during aging and highlight NMNAT1 as a potential therapeutic target for the prevention and treatment of ARHL.
Abstract reproduced from the open-access article under the recorded cc by licence; © the authors. PMID 41521645 · DOI · PMC12793064
Key reviews and meta-analyses
The most cited review-type papers among PubMed’s best-match results for this heading, listed with bibliographic details only. Follow the links for the full text and access terms.
- Research article Cochlear synaptopathy in acquired sensorineural hearing loss: Manifestations and mechanisms [5]
- Research article Mechanisms of hair cell tuning [6]
- Research article The sensory and motor roles of auditory hair cells [7]
- Research article Hair Cell Transduction, Tuning, and Synaptic Transmission in the Mammalian Cochlea [8]
- Research article Regulation of cell fate in the sensory epithelia of the inner ear [9]
- Research article Usher syndrome: Hearing loss, retinal degeneration and associated abnormalities [10]
References
- Kolla L, Kelly MC, Mann ZF, Anaya-Rocha A, Ellis K, Lemons A, et al.. Characterization of the development of the mouse cochlear epithelium at the single cell level. . 2020. PMID 32404924 · DOI · PMC7221106
- Shu Y, Li W, Huang M, Quan YZ, Scheffer D, Tian C, et al.. Renewed proliferation in adult mouse cochlea and regeneration of hair cells. . 2019. PMID 31797926 · DOI · PMC6892913
- Li S, Mecca A, Kim J, Caprara GA, Wagner EL, Du TT, et al.. Myosin-VIIa is expressed in multiple isoforms and essential for tensioning the hair cell mechanotransduction complex. . 2020. PMID 32350269 · DOI · PMC7190839
- Wei Y, Yang W, Wu H, Kong M, Fan D, Zhang Y, et al.. NMNAT1 Activates Autophagy to Delay D-Galactose-Induced Aging in Cochlear Hair Cells. . 2026. PMID 41521645 · DOI · PMC12793064
- Liberman MC, Kujawa SG. Cochlear synaptopathy in acquired sensorineural hearing loss: Manifestations and mechanisms. Hear Res. 2017. PMID 28087419 · DOI · PMC5438769
- Fettiplace R, Fuchs PA. Mechanisms of hair cell tuning. Annu Rev Physiol. 1999. PMID 10099711 · DOI
- Fettiplace R, Hackney CM. The sensory and motor roles of auditory hair cells. Nat Rev Neurosci. 2006. PMID 16371947 · DOI
- Fettiplace R. Hair Cell Transduction, Tuning, and Synaptic Transmission in the Mammalian Cochlea. Compr Physiol. 2017. PMID 28915323 · DOI · PMC5658794
- Kelley MW. Regulation of cell fate in the sensory epithelia of the inner ear. Nat Rev Neurosci. 2006. PMID 17053809 · DOI
- Mathur P, Yang J. Usher syndrome: Hearing loss, retinal degeneration and associated abnormalities. Biochim Biophys Acta. 2015. PMID 25481835 · DOI · PMC4312720
About this article
- Sources
- NLM Medical Subject Headings (definition, synonyms); NCBI PubMed (counts, identifiers); Europe PMC (open-access abstracts and citation counts).
- Verification
- Every reference was resolved against PubMed on 2026-10-31; title, year and DOI matched.
- Review state
- automated source verified; no human expert review has been recorded yet.
- Version
- 1, last updated 2026-10-31.
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Evidence strength
EvidenceHelix's computed view of the study designs behind this topic: how common meta-analyses, randomized trials and reviews are, how recent the literature is, and a plain-language reading. It describes the design mix of the literature. It is not a quality appraisal of any study, and it is not medical advice.