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Auditory spatial deficits in brainstem disorders.

Tomasz Przewoźny1, Anna Gójska-Grymajło2, Tomasz Szmuda3

  • 1Department of Otolaryngology, Medical University of Gdańsk, Gdańsk, Poland.

Neurologia I Neurochirurgia Polska
|December 15, 2015
PubMed
Summary
This summary is machine-generated.

Brainstem disorders significantly impair sound localization abilities. This study highlights the link between brainstem pathologies and spatial hearing deficits, impacting auditory processing.

Keywords:
BrainstemCentral auditory processing disordersCentral hearing lossSound localization impairmentStroke

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Area of Science:

  • Neuroscience
  • Audiology
  • Neurology

Background:

  • Brainstem disorders are increasingly recognized for their potential to disrupt the central auditory system.
  • Spatial hearing deficits are a significant consequence, affecting an individual's ability to perceive sound direction.

Purpose of the Study:

  • To investigate the impact of brainstem disorders on the central auditory system and spatial hearing.
  • To quantify sound localization deficits in patients with various brainstem lesions.

Main Methods:

  • Evaluated 11 patients with brainstem lesions (ischemic stroke, multiple sclerosis, cerebellopontine angle tumor) and 50 healthy controls.
  • Utilized pure tone audiometry (PTAud), brainstem auditory evoked potentials (BAEPs), and the horizontal minimum audible angle test (HMAAT) with binaural stimulation.

Main Results:

  • Patients exhibited significantly prolonged interaural wave I-V latency in BAEPs compared to controls.
  • 81.1% of patients showed abnormal horizontal minimum audible angle test (HMAAT) results, indicating impaired sound localization.
  • Cerebellopontine angle tumor and multiple sclerosis patients displayed the most severe HMAAT disturbances.

Conclusions:

  • Confirms a strong association between brainstem pathologies and impaired sound localization.
  • Underscores the complex relationship between brainstem function and auditory spatial perception.