Myelinated fibre diameters of human inferior alveolar nerves

Heasman, P. A.; Beynon, A.D.

doi:10.1016/0003-9969(86)90013-0

Cited by 6 publications

(3 citation statements)

References 13 publications

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“…In the present study, the cranial nerves, except for the inferior alveolar nerve, exhibited age‐related changes in either the TN or the ATA of myelinated axons. We considered that the cranial nerves were affected not only by the above‐mentioned age‐related biological changes but also by functional changes with the aging process and other factors, for instance, axonal atrophy in the inferior alveolar nerve following tooth loss ( Heasman and Beynon, 1987 ) . Heasman and Beynon reported that the difference between the TN of myelinated axons in the human inferior alveolar nerve of dentate and edentulous groups was significant (p < 0.001) and suggested axonal atrophy in the main nerve trunk following tooth loss ( Heasman and Beynon, 1987 ) .…”

Section: Discussionmentioning

confidence: 99%

Morphometric aspects of peripheral nerves in adults and the elderly

Moriyama

Amano

Itoh

et al. 2007

J Peripheral Nervous Sys

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There have been inconsistencies among reports of age-related differences in human peripheral nerves (PNs). For such studies, normal control values are necessary. Moreover, the diversity of methods employed makes it difficult to compare results. We used the same histological procedures and methods to measure 12 PNs: 8 in the cranial nerves, 2 motor nerves in the lower limb, and 2 nerves in the autonomic system. We performed a morphometric analysis of nerve fibers and estimated the change in the total number (TN) and average transverse area (ATA) of myelinated axons from adulthood to old age. The spinal nerves demonstrated notable age-related changes in TN and ATA. Most of the cranial nerves also demonstrated notable age-related changes in TN and ATA. However, some nerves demonstrated no such age-related changes and were affected more by other factors. With regards to the autonomic nerves, the lesser splanchnic nerve indicated age-related changes in TN, but the greater splanchnic nerve indicated no age-related changes in either TN or ATA. The autonomic nerves were affected not only by the aging process but also by the pathological changes to the peripheral tissues that they innervate.

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Section: Discussionmentioning

confidence: 99%

Morphometric aspects of peripheral nerves in adults and the elderly

Moriyama

Amano

Itoh

et al. 2007

J Peripheral Nervous Sys

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“…According to this study's data, there was no statistically significant difference in the NM, ATA, or ACR of myelinated axons between the female and male IAN specimens (P < 0.05; Table 1). Heasman and Beynon [32] reported a difference between the total number of myelinated axons in the human IAN of dentate and edentulous groups as significant (P < 0.001) and suggested axonal atrophy in the main nerve trunk following tooth loss. As each cadaver in this study had 7 teeth (central incisor, lateral incisor, canine, first premolar, second premolar, first molar, and second molar) on the side of the mandible that I used, I considered that this result was not affected by the dentulous condition.…”

Section: Inferior Alveolar Nervementioning

confidence: 99%

The Relationship Between Sexually Dimorphic Peripheral Nerves and Diseases

Moriyama¹

2013

Sexual Dimorphism

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“…According to this study’s data, there was no statistically significant difference in the total number, average transverse area, or average circularity ratio of myelinated axons between the female and male inferior alveolar nerve specimens ( P < 0.05; Table 1 ). Heasman and Beynon reported a difference between the total number of myelinated axons in the human inferior alveolar nerve of dentate and edentulous groups as significant ( P < 0.001) and suggested axonal atrophy in the main nerve trunk following tooth loss ( Heasman & Beynon, 1987 ). As each cadaver in this study had 7 teeth (central incisor, lateral incisor, canine, first premolar, second premolar, first molar, and second molar) on the side of the mandible that we used, we considered that this result was not affected by the dentulous condition.…”

Section: Discussionmentioning

confidence: 99%

Sex differences in morphometric aspects of the peripheral nerves and related diseases

Moriyama

Hayashi

Inoue

et al. 2016

NRE

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BACKGROUND: The elucidation of the relationship between the morphology of the peripheral nerves and the diseases would be valuable in developing new medical treatments on the assumption that characteristics of the peripheral nerves in females are different from those in males.METHODS: We used 13 kinds of the peripheral nerve. The materials were obtained from 10 Japanese female and male cadavers. We performed a morphometric analysis of nerve fibers. We estimated the total number of myelinated axons, and calculated the average transverse area and average circularity ratio of myelinated axons in the peripheral nerves.RESULTS: There was no statistically significant difference in the total number, average transverse area, or average circularity ratio of myelinated axons between the female and male specimens except for the total number of myelinated axons in the vestibular nerve and the average circularity ratio of myelinated axons in the vagus nerve.CONCLUSIONS: The lower number of myelinated axons in the female vestibular nerve may be one of the reasons why vestibular disorders have a female preponderance. Moreover, the higher average circularity ratio of myelinated axons in the male vagus nerve may be one reason why vagus nerve activity to modulate pain has a male preponderance.

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Myelinated fibre diameters of human inferior alveolar nerves

Cited by 6 publications

References 13 publications

Morphometric aspects of peripheral nerves in adults and the elderly

Morphometric aspects of peripheral nerves in adults and the elderly

The Relationship Between Sexually Dimorphic Peripheral Nerves and Diseases

Sex differences in morphometric aspects of the peripheral nerves and related diseases

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