Kuba J, Kremláek J, Langrová J, Kubová J, Vit J, 2007, "Ageing effect at various levels of visual information processing--VEPs testing" Perception 36 ECVP Abstract Supplement
Ageing effect at various levels of visual information processing--VEPs testing
J Kuba, J Kremláek, J Langrová, J Kubová, J Vit
In 133 healthy volunteers aged 19 - 83 years (38 ± 17 years) we examined reactions of the primary visual cortex to pattern-reversal stimuli, responses of extrastriate areas to motion-onset, and P300 wave in visual cognitive task (recognition of digits and letters). The most distinct change of visual evoked potentials (VEPs) was a prolongation of P300 latency representing highly significant delay of cognitive processes toward elderly (2 ms/1 year of age, r=0.71). Decreased cognitive functions due to ageing are signalled also by reduction of P300 amplitude (r=-0.48). Motion processing (activity of the magnocellular system/dorsal stream) seems to be more influenced by ageing (irrespective of gender) compared to the parvocellular system/ventral stream function according to age-related changes in latencies of the motion-onset VEPs (increase of 0.5 ms/1 year) and of the pattern-reversal VEPs (0.3 ms/1year increase). More detailed information can be found on our web page: http://www.lfhk.cuni.cz/elf.
[Supported by Ministry of Education (VZ 0021620816) and Ministry of Health (Grant NR8421-4/2005) of the Czech Republic.]
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