Cited by 172Hearing, Cochlea, Tinnitus, GeneticsVestibular and auditory disordersHearing Loss and Rehabilitation

Hair cell innervation by spiral ganglion neurons in the mouse

Berglund, A. M., Ryugo, D. K.·1987·Journal of Comparative Neurology

Abstract

Horseradish peroxidase (HRP) was injected extracellularly into the auditory nerve of adult mice so that the enzyme could infuse individual spiral ganglion neurons. Forty-two well-stained neurons were reconstructed through serial sections from their cell bodies to peripheral terminations in the organ of Corti with the aid of a light microscope and drawing tube. No neuron was observed to innervate both inner and outer hair cells (IHCs and OHCs). Previous observations from neonatal mammals that reported that IHCs and OHCs were innervated by the same neuron are thus presumed to describe a transient developmental phenomenon. Two populations of spiral ganglion neurons were determined on the basis of the differences in receptor innervation. The type I neurons innervated exclusively IHCs by way of thick (1-2 microns) radial fibers, whereas the type II neurons innervated only OHCs by way of thin (approximately 0.5 micron) outer spiral fibers. Certain features of the peripheral process in the vicinity of the cell body were highly correlated with fiber type. This pattern of separate innervation of IHCs and OHCs by type I and type II neurons, respectively, may represent the general plan of afferent organization for the adult mammalian cochlea.

Integrity signals

Registry

Crossref · 10.1002/cne.902550408

Cites

33 of 33 references verified0 citation errors · 0 not checkable

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  • Type II cochlear afferents have small caliber, unmyelinated processes that extend hundreds of microns toward the cochlear base, contacting dozens of outer hair cells enroute.

    “Type II cochlear afferents have small caliber, unmyelinated processes that extend hundreds of microns toward the cochlear base, contacting dozens of outer hair cells enroute (27–29).”

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Authors
Berglund, A. M., & Ryugo, D. K.
Affiliations
Massachusetts Eye and Ear Infirmary (US)
Venue
Journal of Comparative Neurology
Publisher
Wiley
Published
1987-01-22
Volume
255
Issue
4
Pages
560-570
ISSN
  • 0021-9967 (ISSN-L)
  • 1096-9861
OpenAlex
W2119585553
Cited by
172
References
34
Citations by year
2026: 6 · 2025: 2 · 2024: 4 · 2023: 1 · 2022: 6 · 2021: 9 · 2020: 8 · 2019: 3 · 2018: 7 · 2016: 7 · 2015: 10 · 2014: 3 · 2013: 1 · 2012: 9
FWCI
3.33
Type
journal article
Language
en
Open access
closed
Locations
  • The Journal of Comparative Neurology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute of General Medical Sciences (GM-07258)
  • National Institute of Neurological Disorders and Stroke (NS 20156, NS 13126)
Topics
  • Life Sciences › Neuroscience › Sensory Systems › Hearing, Cochlea, Tinnitus, Genetics
  • Life Sciences › Neuroscience › Neurology › Vestibular and auditory disorders
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Hearing Loss and Rehabilitation
Keywords
spiral ganglion neurons, inner hair cells, outer hair cells, auditory nerve, radial fibers, hair cell innervation, mouse cochlea
MeSH terms
Animals, Ganglia, Hair Cells, Auditory, Male, Medical Illustration, Mice, Inbred Strains, Neurons, Mice

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