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Related Experiment Videos

Auditory ear extinction in lacunar syndromes.

A Arboix1, C Junqué, P Vendrell

  • 1Department of Neurology, Hospital de la Sta Creu i Sant Pau, Autonomous University of Barcelona, Spain.

Acta Neurologica Scandinavica
|June 1, 1990
PubMed
Summary

Lacunar syndromes affecting the external or internal capsule can cause auditory extinction in the left ear. This suggests subcortical auditory pathways may travel through these brain regions before crossing over.

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Area of Science:

  • Neuroscience
  • Auditory Neuroscience
  • Neuroanatomy

Background:

  • Investigating subcortical auditory pathways is crucial for understanding interhemispheric auditory processing.
  • Lacunar syndromes offer a unique model for studying localized brain lesions.

Purpose of the Study:

  • To investigate the subcortical route of interhemispheric auditory pathways.
  • To determine the effects of lacunar lesions on auditory processing.

Main Methods:

  • Administered a dichotic listening test to 28 patients with lacunar syndromes.
  • Conducted a topographic study to correlate lesion location with auditory deficits.

Main Results:

  • Lesions in the external capsule or anterior limb of the internal capsule caused left ear extinction.

Related Experiment Videos

  • This effect was observed bilaterally.

    • Conclusions:

    • Auditory fibers may traverse the external capsule and anterior limb of the internal capsule.
    • These pathways likely cross to the contralateral cerebral lobe after passing through these subcortical structures.