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Selective deficit of auditory localisation in patients with visuospatial neglect
Francesco Pavani1, Elisabetta Làdavas, Jon Driver
1Institute of Cognitive Neuroscience, University College London, Alexandra House, 17 Queen Square, WC1N 3AR, London, UK. f.pavani@ucl.ac.uk
Neuropsychologia
|October 31, 2001
Summary
Patients with left visuospatial neglect show impaired auditory spatial perception, particularly for sounds on their left side. This suggests increased spatial uncertainty in sound localization due to parietal cortex damage.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Auditory Perception
Background:
- Visuospatial neglect, often resulting from right brain damage, primarily affects attention to the left side of space.
- Auditory processing is typically considered less susceptible to neglect than visual processing.
Purpose of the Study:
- To investigate potential auditory deficits in patients with left visuospatial neglect.
- To determine if auditory spatial perception is selectively impaired in neglect.
Main Methods:
- Compared performance of right brain-damaged (RBD) patients with and without neglect on three auditory tasks.
- Tasks included speeded discrimination of sound elevation (spatial), pitch discrimination (non-spatial), and target detection (non-spatial).
Main Results:
- Neglect patients showed impaired performance only on the auditory spatial discrimination task (sound elevation).
- This deficit was more pronounced for left-sided sounds, indicating impaired auditory space perception.
- No significant difference was found for non-spatial auditory tasks.
Conclusions:
- Patients with visuospatial neglect exhibit a selective deficit in auditory spatial perception.
- The findings suggest increased spatial uncertainty in sound localization, especially for contralesional targets.
- Results support the role of the parietal cortex in multimodal spatial coding.