Spatial judgments in patients with retinitis pigmentosa.

Autor: Wittich W; Centre de recherche institut universitaire de gériatrie de Montréal, 4565, Chemin Queen-Mary, Montréal, Québec, Canada H3W 1W5., Faubert J, Watanabe DH, Kapusta MA, Overbury O
Jazyk: angličtina
Zdroj: Vision research [Vision Res] 2011 Jan; Vol. 51 (1), pp. 165-73. Date of Electronic Publication: 2010 Nov 10.
DOI: 10.1016/j.visres.2010.11.003
Abstrakt: Previous investigations into cortical plasticity in the presence of ocular disease have focused on central retinal damage. Perceptually, patients often report distortions of visual space which can be partially explained by perceptual filling-in. The mechanisms involved could also apply to peripheral field loss. Spatial interval discrimination was tested in 28 retinitis pigmentosa (RP) patients and a control group. When stimuli were presented to both hemispheres, bias did not differ whereas threshold was poorer in RP patients. When presenting the task to only one hemifield, bias was related to field asymmetry, but only in the left visual field, r(2)=.59. Brain laterality may be an important factor when examining changes in cortical function in response to peripheral system damage.
(Copyright © 2010 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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