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
Summary
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.
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.