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Auditory temporal resolution in multiple sclerosis

J M Rappaport1, J M Gulliver, D P Phillips

  • 1Department of Otolaryngology, Dalhousie University, Halifax, Nova Scotia.

The Journal of Otolaryngology
|October 1, 1994
PubMed
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Multiple sclerosis (MS) patients show impaired auditory temporal resolution, particularly with interrupted background noise. This suggests forebrain pathways play a key role in processing sound timing in MS.

Area of Science:

  • Neuroscience
  • Audiology
  • Neurology

Background:

  • Hearing disturbances in multiple sclerosis (MS) are often underestimated due to standard audiologic tests focusing on peripheral function.
  • Central auditory pathway involvement in MS requires further investigation using advanced diagnostic methods.

Purpose of the Study:

  • To investigate auditory temporal processing deficits in MS patients using a comprehensive audiologic and electrophysiologic test battery.
  • To correlate auditory pathway lesions identified via MRI with specific functional impairments.

Main Methods:

  • Prospective selection of MS patients based on MRI-confirmed lesions in auditory pathways (rostral tracts, brainstem, or none).
  • Utilized standard and retrocochlear audiometry, auditory brainstem responses (ABR), and middle latency responses (MLR).

Related Experiment Videos

  • Assessed auditory temporal resolution through gap detection and speech recognition in varied noise conditions.

    • Main Results:

    • MS patients demonstrated selective impairment in speech recognition with interrupted background noise, indicating a temporal processing defect.
    • Electrophysiologic testing (ABR, MLR) provided insights into central auditory pathway function.
    • Lesion location correlated with specific auditory processing alterations.

    Conclusions:

    • MS patients exhibit significant deficits in auditory temporal resolution, particularly affecting speech-in-noise perception.
    • Forebrain pathways appear to play a crucial role in mediating auditory temporal resolution in individuals with MS.
    • Advanced auditory testing is essential for fully characterizing hearing impairments in MS.