Chorda Tympani Nerve Fibers in Man

Ylikoski, Jukka; Gamoletti, Roberto; Galey, Frank R.

doi:10.3109/00016488309130945

Cited by 9 publications

(10 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this study, it was 1,752 in 3 patients (2 adults and 1 child), but it is unclear whether these differences depend on race. 16 The diameters of the regenerated myelinated fibers, however, ranged from 1 to 4 μτη, and the mean value decreased compared with that of the control nerve. There are no reports detailing regenerated chorda tympani nerves in the tympanic cavity in humans.…”

Section: Discussionmentioning

confidence: 86%

“…The mean total number of myelinated fibers in a normal chorda tympani in humans varies from 1,555 15 to 3,525, 16 according to different reports. The mean total number of myelinated fibers in a normal chorda tympani in humans varies from 1,555 15 to 3,525, 16 according to different reports.…”

Section: Discussionmentioning

confidence: 99%

“…The mean total number of myelinated fibers in a normal chorda tympani in humans varies from 1,555 15 to 3,525, 16 according to different reports. On the basis of a previous report that afferent fibers included 79% of all myelinated, but only 30% of all unmyelinated fi-bers in the rat chorda tympani nerve, 17 Ylikoski et al 16 reported that it would appear that the efferent function (secretory) was represented mainly by unmyelinated nerve fibers and that most of the afférents (sensory function) are myelinated in humans, if the human chorda tympani has a relationship similar to that in the rat. As shown in this report, the fact that the regenerated nerves did not run across the aerated cavity, but inside the reconstructed eardrum, was considered reasonable.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Morphological and Functional Study of Regenerated Chorda Tympani Nerves in Humans

Shibamori¹,

Yamamoto²,

Saito³

et al. 2000

Ann Otol Rhinol Laryngol

View full text Add to dashboard Cite

It is still unclear whether the chorda tympani nerves in humans regenerate after being severed during middle ear surgery, although functional studies have demonstrated recovery of taste 1 to 2 years after surgery. To date, 12 cases of regenerated chorda tympani nerves have been found in our series of patients during secondary surgery. The regenerated nerves of 3 cases of the 12 were removed as samples during secondary surgery to detect regenerated myelinated axons. All regenerated nerves were in the submucosal connective tissue layer of the reconstructed eardrum. In the regenerated nerves, myelinated nerve fibers existed in a small fascicle or in connective tissue, but the number of myelinated axons was low compared with that in normal subjects ( 1.752 +/- 78; n = 3), and the distribution was sparse. The total number of regenerated myelinated axons varied from 141 (8.3%) to 979 (55.9%). From a functional study using electrogustometry, incomplete recovery of electrogustation was observed in all 3 cases before secondary surgery, suggesting that chorda tympani nerves actually regenerate in the middle ear and do function.

show abstract

Section: Discussionmentioning

confidence: 86%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Morphological and Functional Study of Regenerated Chorda Tympani Nerves in Humans

Shibamori¹,

Yamamoto²,

Saito³

et al. 2000

Ann Otol Rhinol Laryngol

View full text Add to dashboard Cite

show abstract

“…Typically, the facial nerve gives off the chorda tympani in the vertical mastoid segment, just before it exits the skull at the stylomastoid foramen. At this point, the facial nerve is composed mostly of large, myelinated fibres, with the smaller (approximately 2–3 µm) fibres of the chorda tympani distributed throughout 6 , 12 , 13 rather than aggregated into a discrete bundle as in animals 13 . Rarely, facial nerve motor fibres travel with an enlarged chorda tympani, 14 although this concept has been disputed 15 …”

Section: Within the Facial Canalmentioning

confidence: 99%

“…Electron microscopy shows that the tympanic segment of the chorda tympani consists of about 5000 nerve fibres, two-thirds of which are myelinated 13 . In the rat, most of these myelinated fibres are sensory afferents, whilst the unmyelinated fibres are secretomotor efferents 13 …”

Section: Across the Tympanummentioning

confidence: 99%

Clinical anatomy of the chorda tympani: a systematic review

2011

View full text Add to dashboard Cite

show abstract

Olfaction and Taste

Lorenzo

Youngentob

2003

Handbook of Psychology

View full text Add to dashboard Cite

The ability to detect and interpret the chemicals in our environment affects nearly every aspect of our survival. The flavor of our food, i.e., the combination of its taste and smell, is used both to prompt ingestion of nutrients and to protect us from ingesting or inhaling toxins. In the study of taste and olfaction, there are certain as yet unresolved questions that date from the very earliest research into these areas. For example, there is continued debate on the nature of primary stimuli, on the mechanisms of transduction, and on the ways in which stimuli are encoded and interpreted by the nervous system. In this review, the current thinking about these questions, as well as some recent data that may help to resolve them, are outlined. Data from both animal and human models are used to show how technological advances, particularly in the realm of molecular neurobiology, are providing the tools for a new and more complete understanding of how we taste and smell the chemicals in our environment.

show abstract

Chorda Tympani Nerve Fibers in Man

Cited by 9 publications

References 10 publications

Morphological and Functional Study of Regenerated Chorda Tympani Nerves in Humans

Morphological and Functional Study of Regenerated Chorda Tympani Nerves in Humans

Clinical anatomy of the chorda tympani: a systematic review

Olfaction and Taste

Contact Info

Product

Resources

About