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Monocular patching may worsen sensory-attentional neglect: a case report.
A M Barrett1, G P Crucian, D Q Beversdorf
1Department of Medicine, Division of Neurology, Pennsylvania State University College of Medicine, Hershey, PA, USA. amb33@psu.edu
Archives of Physical Medicine and Rehabilitation
|April 11, 2001
Summary
Monocular patching unexpectedly altered spatial bias in a patient with sensory-attentional bias. Left eye patching improved performance, while right eye patching worsened it, highlighting potential clinical implications.
Area of Science:
- Neuroscience
- Ophthalmology
- Cognitive Psychology
Background:
- Sensory-attentional bias can affect spatial cognition, particularly after cortical injury.
- The line bisection task is a standard tool for assessing spatial attention and bias.
Observation:
- A patient with right cortical infarction exhibited a sensory-attentional bias on the line bisection task.
- Monocular patching was applied to the left eye, right eye, or the patient was unpatched.
Findings:
- Paradoxically, patching the right eye significantly worsened the patient's performance on the line bisection task.
- Patching the left eye led to a significant improvement in performance, reducing the spatial bias.
Implications:
- Monocular patching can influence spatial bias, potentially through superior colliculus input or novel tactile stimulus-induced orienting.
- Clinicians should consider the impact of monocular patching on spatial bias in patients, especially those with neurological conditions.