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Gaze direction modulates auditory spatial deficits in stroke patients with neglect
Francesco Pavani1, Elisabetta Làdavas, Jon Driver
1Department of Cognitive Sciences and Education, University of Trento, Italy. pavani@form.unitn.it
Summary
Lateral eye movements can reduce auditory spatial deficits in patients with left neglect. This suggests that gaze direction influences how the brain processes sound location, even when the sound source remains unchanged.
Area of Science:
- Neuroscience
- Auditory Perception
- Spatial Cognition
Background:
- Left neglect is a common deficit following right-hemisphere damage.
- Auditory spatial deficits are frequently observed in patients with neglect.
- The influence of eye position on auditory spatial processing remains unclear.
Purpose of the Study:
- To investigate how eye position affects auditory spatial deficits in patients with left neglect.
- To determine if changing gaze direction modulates auditory spatial performance.
Main Methods:
- Four patients with left neglect and right-hemisphere damage performed an auditory elevation discrimination task.
- Gaze direction was fixed in three positions: left, central, and right.
- Head movements were prevented to maintain constant auditory input.
Main Results:
- Patients showed worse performance for left-sided auditory targets compared to right-sided targets, confirming auditory neglect.
- This neglect-related deficit was significantly reduced when patients gazed to the left.
- Reaction times and errors for auditory targets were modulated by gaze direction.
Conclusions:
- Lateral gaze direction can modulate auditory spatial deficits in patients with neglect.
- These findings suggest audio-visual interactions and potential retinocentric influences on sound localization.
- Multisensory brain regions may integrate eye position with auditory information.