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Related Experiment Videos

Two types of auditory neglect.

A Bellmann1, R Meuli, S Clarke

  • 1Division de Neuropsychologie and Service de Radiodiagnostic, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland.

Brain : a Journal of Neurology
|April 5, 2001
PubMed
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Auditory neglect, characterized by inattention to the left hemispace, presents in two distinct forms. These forms are linked to either basal ganglia or frontotemporoparietal lesions, impacting auditory spatial attention or representation.

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Audiology

Background:

  • Auditory neglect is often associated with left ear extinction in dichotic listening, but its diagnostic validity for attentional deficits is debated.
  • Right unilateral hemispheric lesions can lead to auditory neglect and left ear extinction.

Observation:

  • Four patients with right unilateral hemispheric lesions exhibiting left ear extinction were studied.
  • Auditory spatial attention was assessed using a diotic interaural time difference (ITD) test and sound localization.
  • Patients showed distinct patterns of performance on these tasks.

Findings:

  • Two patient groups emerged: one with ITD test asymmetry (basal ganglia lesions) and another with sound localization bias (cortical lesions).
  • The first group showed impaired auditory spatial attention allocation.

Related Experiment Videos

  • The second group demonstrated a distorted auditory spatial representation.

    • Implications:

    • This research identifies two distinct subtypes of auditory neglect based on behavioral and anatomical profiles.
    • Understanding these subtypes can refine diagnosis and inform targeted rehabilitation strategies for patients with hemispheric brain damage.