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Statements

Subject Item
n2:RIV%2F00216208%3A11150%2F13%3A10138854%21RIV14-GA0-11150___
rdf:type
n7:Vysledek skos:Concept
rdfs:seeAlso
http://www.sciencedirect.com/science/article/pii/S0042698913000151
dcterms:description
We examined the visual and cognitive functions of a 72-year-old subject, KP, who recovered his sight after 53 years of visual deprivation. We used visual evoked potentials (VEPs) to pattern-reversal and motion-onset stimuli and cognitive responses (ERPs) during the oddball paradigm to assess the effect of long-term deprivation on a mature visual system. KP lost his sight at the age of 17 years, and light projection onto his right retina was restored at 71 years by a corneal implant. Nine months after sight recovery we recorded reproducible responses to all examined stimuli. The response to pattern reversal contained two P100-like peaks with the later peak being dominant and significantly delayed (260 ms) when compared to the P100s of two control subjects, to whom the stimuli were adjusted in size and contrast to mimic KP's vision. KP's motion-onset VEPs to full-field and peripheral stimuli had a characteristic shape with a well-defined N2 peak; however, both peaks were significantly delayed (262 and 272 ms) compared to control responses. Unlike the P100 and N2 peaks, which represent sensory detection, the P3b/P300 component of the ERP to a target event in the oddball paradigm was not further delayed. In spite of degraded vision and sensory deprivation lasting 53 years, KP displayed reproducible responses to all reported stimuli. Long-term visual deprivation and retinal detachment degraded KP's visual sensory processing, assessed by pattern-reversal and motion-onset VEPs, whereas the cognitive processing of appropriate visual stimuli was not compromised. We examined the visual and cognitive functions of a 72-year-old subject, KP, who recovered his sight after 53 years of visual deprivation. We used visual evoked potentials (VEPs) to pattern-reversal and motion-onset stimuli and cognitive responses (ERPs) during the oddball paradigm to assess the effect of long-term deprivation on a mature visual system. KP lost his sight at the age of 17 years, and light projection onto his right retina was restored at 71 years by a corneal implant. Nine months after sight recovery we recorded reproducible responses to all examined stimuli. The response to pattern reversal contained two P100-like peaks with the later peak being dominant and significantly delayed (260 ms) when compared to the P100s of two control subjects, to whom the stimuli were adjusted in size and contrast to mimic KP's vision. KP's motion-onset VEPs to full-field and peripheral stimuli had a characteristic shape with a well-defined N2 peak; however, both peaks were significantly delayed (262 and 272 ms) compared to control responses. Unlike the P100 and N2 peaks, which represent sensory detection, the P3b/P300 component of the ERP to a target event in the oddball paradigm was not further delayed. In spite of degraded vision and sensory deprivation lasting 53 years, KP displayed reproducible responses to all reported stimuli. Long-term visual deprivation and retinal detachment degraded KP's visual sensory processing, assessed by pattern-reversal and motion-onset VEPs, whereas the cognitive processing of appropriate visual stimuli was not compromised.
dcterms:title
Spared cognitive processing of visual oddballs despite delayed visual evoked potentials in patient with partial recovery of vision after 53 years of blindness Spared cognitive processing of visual oddballs despite delayed visual evoked potentials in patient with partial recovery of vision after 53 years of blindness
skos:prefLabel
Spared cognitive processing of visual oddballs despite delayed visual evoked potentials in patient with partial recovery of vision after 53 years of blindness Spared cognitive processing of visual oddballs despite delayed visual evoked potentials in patient with partial recovery of vision after 53 years of blindness
skos:notation
RIV/00216208:11150/13:10138854!RIV14-GA0-11150___
n7:predkladatel
n12:orjk%3A11150
n3:aktivita
n6:P n6:I
n3:aktivity
I, P(GA309/09/0869), P(GAP407/12/2528)
n3:cisloPeriodika
April 5
n3:dodaniDat
n13:2014
n3:domaciTvurceVysledku
n17:8345074 n17:9050051 n17:8818649 n17:3063038 n17:9736344 n17:1987453
n3:druhVysledku
n21:J
n3:duvernostUdaju
n20:S
n3:entitaPredkladatele
n11:predkladatel
n3:idSjednocenehoVysledku
106775
n3:idVysledku
RIV/00216208:11150/13:10138854
n3:jazykVysledku
n15:eng
n3:klicovaSlova
P3b; Oddball ERPs; Pattern-reversal VEPs; Motion-onset VEPs; Recovery from blindness; Visual deprivation
n3:klicoveSlovo
n4:Visual%20deprivation n4:Motion-onset%20VEPs n4:P3b n4:Recovery%20from%20blindness n4:Pattern-reversal%20VEPs n4:Oddball%20ERPs
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[CA63070D8720]
n3:nazevZdroje
Vision Research
n3:obor
n14:FH
n3:pocetDomacichTvurcuVysledku
6
n3:pocetTvurcuVysledku
9
n3:projekt
n10:GAP407%2F12%2F2528 n10:GA309%2F09%2F0869
n3:rokUplatneniVysledku
n13:2013
n3:svazekPeriodika
81
n3:tvurceVysledku
Vít, František Stodůlka, Pavel Šimeček, Michal Kuba, Miroslav Langrová, Jana Šikl, Radovan Kremláček, Jan Kubová, Zuzana Szanyi, Jana
n3:wos
000316837900001
s:issn
0042-6989
s:numberOfPages
5
n5:doi
10.1016/j.visres.2012.12.013
n18:organizacniJednotka
11150