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Statements

Subject Item
n2:RIV%2F00216208%3A11150%2F12%3A10123192%21RIV13-GA0-11150___
rdf:type
skos:Concept n16:Vysledek
rdfs:seeAlso
http://www.springerlink.com/content/y142704310w67707/fulltext.pdf
dcterms:description
Visual evoked potentials to motion-onset stimulation (M-VEPs) gradually attenuate in amplitude during examination. The observed decline in averaged responses can be caused by decreases in single response magnitudes and/or increased variability in a response delays, i.e., latency jittering. To illuminate the origins of the suppression of M-VEPs during stimuli repetition we used correlation technique to estimate an upper bound of possible latency jittering of single sweeps and we evaluated the effect of its correction on the amplitudes of three M-VEP dominant peaks P1, N2 and P3. During prolonged visual motion stimulation, the variability of corrective latency shifts in the occipital region increased (r = 0.35 : 0.44) and the number of single responses corresponding to the average curve declined in occipital and parietal derivations (r = -0.48 : -0.62). While the P1 peak amplitude did not exhibit any time-specific behaviour, the N2 amplitude exhibited a significant decay of 29.4 % that was partially reduced to 16.6 % in the central occipital derivation by the latency jitter and non-correspondence corrections. The strongest attenuation (32.7 %) was observed in the P3 amplitude and was less sensitive to the corrections, dropping only to 27.9 %. The main part of the response suppression to repeated motion stimulation was caused by amplitude drop and represents non-stationary process that likely correspond to a fatigue model. The rise of variability in latency jitter correction and the reduction of single responses correlated with the M-VEP were significant factors associated with prolonged motion stimulation. The relation of these parameters to a hypothetical veridical response is ambiguous and can be caused by a time shift of the response or by a change of signal to noise ratio. Using selective averaging and latency jitter correction, the effect of response suppression was partially removed. Visual evoked potentials to motion-onset stimulation (M-VEPs) gradually attenuate in amplitude during examination. The observed decline in averaged responses can be caused by decreases in single response magnitudes and/or increased variability in a response delays, i.e., latency jittering. To illuminate the origins of the suppression of M-VEPs during stimuli repetition we used correlation technique to estimate an upper bound of possible latency jittering of single sweeps and we evaluated the effect of its correction on the amplitudes of three M-VEP dominant peaks P1, N2 and P3. During prolonged visual motion stimulation, the variability of corrective latency shifts in the occipital region increased (r = 0.35 : 0.44) and the number of single responses corresponding to the average curve declined in occipital and parietal derivations (r = -0.48 : -0.62). While the P1 peak amplitude did not exhibit any time-specific behaviour, the N2 amplitude exhibited a significant decay of 29.4 % that was partially reduced to 16.6 % in the central occipital derivation by the latency jitter and non-correspondence corrections. The strongest attenuation (32.7 %) was observed in the P3 amplitude and was less sensitive to the corrections, dropping only to 27.9 %. The main part of the response suppression to repeated motion stimulation was caused by amplitude drop and represents non-stationary process that likely correspond to a fatigue model. The rise of variability in latency jitter correction and the reduction of single responses correlated with the M-VEP were significant factors associated with prolonged motion stimulation. The relation of these parameters to a hypothetical veridical response is ambiguous and can be caused by a time shift of the response or by a change of signal to noise ratio. Using selective averaging and latency jitter correction, the effect of response suppression was partially removed.
dcterms:title
Role of latency jittering correction in motion-onset VEP amplitude decay during prolonged visual stimulation Role of latency jittering correction in motion-onset VEP amplitude decay during prolonged visual stimulation
skos:prefLabel
Role of latency jittering correction in motion-onset VEP amplitude decay during prolonged visual stimulation Role of latency jittering correction in motion-onset VEP amplitude decay during prolonged visual stimulation
skos:notation
RIV/00216208:11150/12:10123192!RIV13-GA0-11150___
n16:predkladatel
n17:orjk%3A11150
n3:aktivita
n15:P
n3:aktivity
P(GA309/09/0869), P(GAP407/12/2528)
n3:cisloPeriodika
3
n3:dodaniDat
n21:2013
n3:domaciTvurceVysledku
n4:9736344 n4:3063038 n4:1987453 n4:8818649 n4:9050051 n4:8345074
n3:druhVysledku
n13:J
n3:duvernostUdaju
n20:S
n3:entitaPredkladatele
n14:predkladatel
n3:idSjednocenehoVysledku
166018
n3:idVysledku
RIV/00216208:11150/12:10123192
n3:jazykVysledku
n9:eng
n3:klicovaSlova
intra-individual variability; repetition response suppression; habituation; adaptation; selective averaging; latency jittering; Motion-onset VEPs
n3:klicoveSlovo
n7:habituation n7:intra-individual%20variability n7:repetition%20response%20suppression n7:adaptation n7:latency%20jittering n7:selective%20averaging n7:Motion-onset%20VEPs
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[B8094717AA79]
n3:nazevZdroje
Documenta Ophthalmologica
n3:obor
n11:FH
n3:pocetDomacichTvurcuVysledku
6
n3:pocetTvurcuVysledku
7
n3:projekt
n10:GA309%2F09%2F0869 n10:GAP407%2F12%2F2528
n3:rokUplatneniVysledku
n21:2012
n3:svazekPeriodika
124
n3:tvurceVysledku
Kuba, Miroslav Kremláček, Jan Szanyi, Jana Vít, František Hulan, Martin Langrová, Jana Kubová, Zuzana
n3:wos
000304397800004
s:issn
0012-4486
s:numberOfPages
13
n18:doi
10.1007/s10633-012-9321-6
n5:organizacniJednotka
11150