強大音響暴露後に出現した方向交代性上向性頭位眼振の一症例  [in Japanese] Case Report on the Apogeotropic Direction Changing Type of Positional Nystagmus Following Acoustic Trauma  [in Japanese]

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Author(s)

Abstract

A 56-year-old man complained of a hearing loss and tinnitus in his right ear after short intense exposure to a high level of sound. Although he had no complaints of vertigo or dizziness, his neuro-otological examination revealed apogeotropic direction changing type of positional nystagmus. An audiogram showed right high-frequency sensorineural hearing loss. An eye tracking test (ETT) and an optokinetic nystagmus (OKN) test showed no abnormalities. A caloric test showed normal responses in both ear sides. One week after the exposure to a high level of sound, the positional nystagmus completely disappeared.<BR>Apogeotropic direction changing type of positional nystagmus is generally considered to be a phenomenon observed in patients with central vestibular lesion. However, physical examination and laboratory tests of this patient suggested that he suffered from only a peripheral vestibular impairment. From these results, apogeotropic direction changing type of positional nystagmus observed in this patient resulted from an impair-ment of the peripheral vestibular system.

Journal

  • Equilibrium Research

    Equilibrium Research 58(4), 311-316, 1999-08-01

    Japan Society for Equilibrium Research

References:  23

Cited by:  1

Codes

  • NII Article ID (NAID)
    10008712843
  • NII NACSIS-CAT ID (NCID)
    AN00001485
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    03855716
  • Data Source
    CJP  CJPref  J-STAGE 
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