Comparisons of acoustic function in SCA31 and other forms of ataxias

Yoshio Ikeda, Makiko Nagai, Tomoko Kurata, Toru Yamashita, Yasuyuki Ohta, Shoko Nagotani, Kentaro Deguchi, Yasushi Takehisa, Yoshihiko Shiro, Tohru Matsuura, Koji Abe

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


Objective: To investigate whether acoustic impairment can be one of the characteristic extracerebellar symptoms in sporadic and hereditary ataxias including spinocerebellar ataxia type 31 (SCA31). Methods: We investigated genotypes of dominant ataxia families, and determined a frequency of each form in our cohort of 154 families. Acoustic function in the groups of various forms of ataxia with multiple system atrophy of cerebellar predominance (MSA-C), cortical cerebellar atrophy (CCA), and hereditary ataxias including SCA31 was evaluated by using audiogram and brainstem auditory evoked potentials (BAEPs). Results: Genetic analysis of dominant ataxia families revealed that a frequency of SCA31 in our cohort was fewer than that reported from other areas of Japan, indicating that SCA31 is not widely distributed throughout Japan. Results of audiogram showed no significant difference of hearing levels among ataxic groups, and those of BAEPs did not support inner ear dysfunction in SCA31 in which hearing loss had initially been suggested as one of its characteristic symptoms. Conclusion: This study suggests that acoustic impairment is neither specific to SCA31, MSA-C and CCA nor useful in making a differential diagnosis among them.

Original languageEnglish
Pages (from-to)427-432
Number of pages6
JournalNeurological Research
Issue number4
Publication statusPublished - May 2011


  • Ataxia
  • Audiogram
  • Brainstem auditory evoked potential
  • Hearing level
  • SCA31

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology


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