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The chorda tympani degenerates during chronic otitis media: an electron microscopy study
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Medicinska och farmaceutiska vetenskapsområdet, centrumbildningar mm, Centre for Clinical Research, County of Västmanland.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences, Otolaryngology and Head and Neck Surgery.
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2015 (English)In: Acta Oto-Laryngologica, ISSN 0001-6489, Vol. 135, no 6, 542-548 p.Article in journal (Refereed) Published
Abstract [en]

Conclusion: Chorda tympani nerve specimens from ears with chronic inflammatory middle ear disease exhibit structural signs of degeneration. These correlate well with taste disturbance. Simultaneously, they exhibit signs of regeneration, which may explain the ability for taste recovery. Objectives: The chorda tympani, the major taste nerve, runs uncovered through the middle ear cavity. This situation exposes it to various forms of middle ear pathology. A difference has been noticed regarding taste symptoms pre- and postoperatively between inflammatory and non-inflammatory diseases. The present study aimed to investigate ultrastructural changes of chorda tympani in different forms of inflammatory middle ear disease, such as chronic suppurative otitis media and cholesteatoma, as compared with normal. Methods: Five chorda tympani specimens were collected from healthy middle ears of patients subjected to surgery for acoustic neuroma, to be used as normal controls, and five from middle ears with chronic otitis media or cholesteatoma, where the nerve could not be saved during the operation. Light and electron microscopy were performed. Results: For all five nerves from diseased ears, microscopy showed a higher percentage of axon and myelin sheath degeneration than in the normal controls. Furthermore, three of the five also exhibited sprouting.

Place, publisher, year, edition, pages
2015. Vol. 135, no 6, 542-548 p.
Keyword [en]
Taste, otosurgery, degeneration, sprouting
National Category
URN: urn:nbn:se:uu:diva-255041DOI: 10.3109/00016489.2014.999875ISI: 000354215700004PubMedID: 25719908OAI: oai:DiVA.org:uu-255041DiVA: diva2:825353
Swedish Research Council, 2010-7209
Available from: 2015-06-23 Created: 2015-06-12 Last updated: 2015-06-23Bibliographically approved

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Centre for Clinical Research, County of VästmanlandOtolaryngology and Head and Neck Surgery
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