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Related Experiment Videos

Spatial and temporal auditory processing deficits following right hemisphere infarction. A psychophysical study

T D Griffiths1, A Rees, C Witton

  • 1Department of Physiological Sciences, Newcastle University, Newcastle upon Tyne, UK.

Brain : a Journal of Neurology
|May 1, 1997
PubMed
Summary

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A patient with a right hemisphere stroke developed amusia, a musical deficit, despite normal speech and environmental sound perception. This case highlights auditory agnosia and suggests temporal processing deficits underlie musical impairments.

Area of Science:

  • Neuroscience
  • Auditory Neuroscience
  • Cognitive Neurology

Background:

  • Investigated higher auditory function after a right hemisphere infarction.
  • Focused on a patient with a deficit in musical appreciation.

Observation:

  • Patient presented with a dissociated receptive musical deficit.
  • Normal appreciation of environmental sounds and speech was noted.
  • Preserved ability to detect continuous sound frequency changes.

Findings:

  • Confirmed amusia as a distinct form of auditory agnosia.
  • Identified a deficit in the analysis of rapid temporal sequences of notes.
  • Discovered an unexpected deficit in the perception of apparent sound-source movement, analogous to akinetopsia.

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Implications:

  • Suggests amusia can result from unilateral lesions, challenging previous hypotheses.
  • Provides evidence for auditory temporal and spatial 'scene analysis' deficits.
  • Highlights the role of areas outside primary auditory cortex in complex auditory processing.