Perceptual visual filling-in of toxoplasmic retinochoroiditis scotomas
| Autor: | Denise P. Alvarenga, Márcia Couto, Valdir Filgueiras Pessoa |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Adult
Male medicine.medical_specialty Adolescent genetic structures media_common.quotation_subject Audiology Retina Lesion chemistry.chemical_compound Perception Reaction Time medicine Animals Humans Scotoma Toxoplasmosis Ocular Vision Ocular Aged Visual Cortex media_common Neurologic Examination Choroid Filling-in General Neuroscience Blind spot Significant difference Retinal Middle Aged Adaptation Physiological Illusions eye diseases Visual field Surgery medicine.anatomical_structure Chorioretinitis chemistry Visual Perception Female sense organs medicine.symptom Psychology Toxoplasma Photic Stimulation |
| Zdroj: | NeuroReport. 18:1679-1681 |
| ISSN: | 0959-4965 |
| Popis: | UNLABELLED Perceptual visual filling-in of toxoplasmic retinochoroiditis chronic scotomas was studied in 13 patients. Although there is deficit of visual inputs, patients with such chronic lesions perceive the region in the visual field uninterrupted. Targets were programmed to appear just outside the edge of the retinal lesion, and healthy retinal areas in the same eye. The results showed no significant difference in perceptual filling-in latencies (P>0.05). CONCLUSIONS (i) neural mechanisms of filling-in at the blind spot are probably involved explaining this perceptual phenomenon; (ii) any neuronal changes occurring at the edge of the lesion only affected filling-in within the scotoma area. |
| Databáze: | OpenAIRE |
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