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单词 perineurium
释义

Definition of perineurium in English:

perineurium

noun ˌpɛrɪˈnjʊərɪəmˌperəˈn(y)o͝orēəm
mass nounAnatomy
  • The sheath of connective tissue surrounding a bundle (fascicle) of nerve fibres within a nerve.

    Example sentencesExamples
    • However, in most of the smaller fibers the space between nerve and perineurium was reduced or absent, so that it could not be established whether the peripheral staining represented nerve fibers or perineurium.
    • Briefly, the nerve fibers were closely packed in the nerve bundles in the endoneurial areas surrounded by the perineurium and the epineurium.
    • In these lesions, the hyphae appeared to invade the perineurium, the loose fascial sheath surrounding the nerve.
    • It strongly stained the perineurium but did not stain the nerve fibers within the perineurium, thus giving a ringlike staining pattern.
    • The endoneurium is continuous with the more abundant connective tissue perineurium, which envelops bundles of nerve fibers.
    Synonyms
    covering, cover, case, casing, envelope, sleeve, wrapper

Derivatives

  • perineural

  • adjective ˌpɛrɪˈnjʊərəlˌpɛrəˈn(j)ʊrəl
    Anatomy
    • Located around a nerve or a bundle of nerve fibres.

      a perineural cyst
      Example sentencesExamples
      • perineural inflammation
      • The distribution of amyloid (endoneurial, perineurial, or epineurial), the presence of inflammation, and the presence of axonal degeneration or demyelination were recorded for each case.
      • It may be that epithelial membrane antigen is focally positive, a finding in agreement with the presence of perineurial cell component in the tumors.
      • In one of these 2 biopsies, ganglion cells were identified within the perineurial ring.

Origin

Mid 19th century: modern Latin, from Greek peri- 'around' + neuron 'sinew'.

 
 

Definition of perineurium in US English:

perineurium

nounˌperəˈn(y)o͝orēəm
Anatomy
  • The sheath of connective tissue surrounding a bundle (fascicle) of nerve fibers within a nerve.

    Example sentencesExamples
    • In these lesions, the hyphae appeared to invade the perineurium, the loose fascial sheath surrounding the nerve.
    • It strongly stained the perineurium but did not stain the nerve fibers within the perineurium, thus giving a ringlike staining pattern.
    • Briefly, the nerve fibers were closely packed in the nerve bundles in the endoneurial areas surrounded by the perineurium and the epineurium.
    • However, in most of the smaller fibers the space between nerve and perineurium was reduced or absent, so that it could not be established whether the peripheral staining represented nerve fibers or perineurium.
    • The endoneurium is continuous with the more abundant connective tissue perineurium, which envelops bundles of nerve fibers.
    Synonyms
    covering, cover, case, casing, envelope, sleeve, wrapper

Origin

Mid 19th century: modern Latin, from Greek peri- ‘around’ + neuron ‘sinew’.

 
 
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更新时间:2024/12/23 23:47:17