Monocular patching may worsen sensory-attentional neglect: a case report.
To determine whether monocular patching influences the performance of a patient with primarily sensory-attentional bias on the line bisection task, we present a case study of a 49-year-old woman who had right cortical infarction affecting temporal, parietal, and occipital regions. She had primarily sensory-attentional bias when performing the line bisection task on a video apparatus. In hospital, she was tested with monocular eye patching of the left or the right eye or unpatched. Paradoxically, the right-eye patching significantly worsened and the left patch significantly improved performance. The eye may have some input to the ipsilateral as well as the contralateral superior colliculus. Alternatively, the patch-a novel tactile stimulus-may induce orienting to its side via noncollicular mechanisms. When using a monocular patch for any reason, clinicians should be aware that increased spatial bias may occur.
Barrett
A M
AM
Department of Medicine, Division of Neurology, Pennsylvania State University College of Medicine, Hershey, PA, USA. amb33@psu.edu
Crucian
G P
GP
Beversdorf
D Q
DQ
Heilman
K M
KM
D000704:Analysis of Variance; D001288:Attention; D001458:Bandages; D005133:Eye Movements; D005260:Female; D006801:Humans; D008875:Middle Aged; D010468:Perceptual Disorders / Q000503:physiopathology / Q000534:rehabilitation*; D012683:Sensory Deprivation; D020521:Stroke / Q000503:physiopathology*; D014786:Vision Disorders / Q000503:physiopathology / Q000534:rehabilitation*