Visual evoked potentials and event related potentials in congenitally deaf subjects
Language English Country Czech Republic Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
15717858
PII: 649
Knihovny.cz E-resources
- MeSH
- Deafness congenital physiopathology rehabilitation MeSH
- Cognition MeSH
- Humans MeSH
- Adolescent MeSH
- Pattern Recognition, Visual MeSH
- Occipital Lobe physiopathology MeSH
- Sign Language * MeSH
- Visual Perception classification MeSH
- Evoked Potentials, Visual * MeSH
- Check Tag
- Humans MeSH
- Adolescent MeSH
- Male MeSH
- Female MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
The purpose was to test parameters of visual evoked potentials (VEPs) and of event-related potentials (ERPs) in deaf subjects to verify visual and cognitive CNS functions in a handicapped group of the population. Three types of visual stimuli (with dominating parvocellular or magnocellular system activation or with cognitive tasks) were used in the study. Six deaf persons (4 women, 2 men, mean age 17 years) and 6 persons with normal hearing (sex- and age-matched) were included in this pilot study. In all types of stimulation, latencies and amplitudes of main VEPs and ERPs components were evaluated. No significant latency differences were found. However, significantly reduced amplitudes were found in the occipital area for responses to motion and cognitive stimuli which might be interpreted as a part of functional reorganization of the extrastriate and cognitive cortical areas of deaf subjects.
