Journal article
Monocular patching may induce ipsilateral “where” spatial bias
Neuropsychologia, Vol.47(3), pp.711-716
2009
DOI: 10.1016/j.neuropsychologia.2008.11.022
PMCID: PMC2682363
PMID: 19100274
Abstract
Spatial bias is an asymmetry of perception and/or representation of spatial information – “where” bias –, or of spatially directed actions – “aiming” bias. A monocular patch may induce contralateral “where” spatial bias (the Sprague effect [Sprague, J. M. (1966). Interaction of cortex and superior colliculus in mediation of visually guided behavior in cat.
Science, 153(3743), 1544–1547]). However, an ipsilateral patch-induced spatial bias may be observed if visual occlusion results in top-down, compensatory re-allocation of spatial perceptual or representational resources toward the region of visual deprivation. Tactile distraction from a monocular patch may also contribute to an ipsilateral bias. To examine these hypotheses, neurologically normal adults bisected horizontal lines at baseline without a patch, while wearing a monocular patch, and while wearing tactile-only and visual-only monocular occlusion. We fractionated “where” and “aiming” spatial bias components using a video apparatus to reverse visual feedback for half of the test trials. The results support monocular patch-induced
ipsilateral “where” spatial errors, which are not consistent with the Sprague effect. Further, the present findings suggested that the induced ipsilateral bias may be primarily induced by visual deprivation, consistent with compensatory “where” resource re-allocation.
Details
- Title: Subtitle
- Monocular patching may induce ipsilateral “where” spatial bias
- Creators
- Peii Chen - Stroke Rehabilitation Research Laboratory, the Kessler Foundation Research Center, and Department of Physical Medicine and Rehabilitation, The University of Medicine and Dentistry, NJ – NJ Medical School (UMDNJ-NJMS), 1199 Pleasant Valley Way, West Orange, NJ 07052, United StatesLillian Erdahl - Department of Neurology, Penn State College of Medicine, United StatesAnna M Barrett - Stroke Rehabilitation Research Laboratory, the Kessler Foundation Research Center, and Department of Physical Medicine and Rehabilitation, The University of Medicine and Dentistry, NJ – NJ Medical School (UMDNJ-NJMS), 1199 Pleasant Valley Way, West Orange, NJ 07052, United States
- Resource Type
- Journal article
- Publication Details
- Neuropsychologia, Vol.47(3), pp.711-716
- DOI
- 10.1016/j.neuropsychologia.2008.11.022
- PMID
- 19100274
- PMCID
- PMC2682363
- NLM abbreviation
- Neuropsychologia
- ISSN
- 0028-3932
- eISSN
- 1873-3514
- Publisher
- Elsevier Ltd
- Language
- English
- Date published
- 2009
- Academic Unit
- Surgery
- Record Identifier
- 9984051585802771
Metrics
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