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Statements

Subject Item
n2:RIV%2F00216208%3A11150%2F13%3A10138972%21RIV14-GA0-11150___
rdf:type
n6:Vysledek skos:Concept
rdfs:seeAlso
http://www.frontiersin.org/Human_Neuroscience/10.3389/fnhum.2013.00411/full
dcterms:description
The manipulation of attention can produce mismatch negativity-like components that are not necessarily connected to the unintentional sensory registration of the violation of probability-based regularity. For clinical purposes, attentional bias should be quantified because it can vary substantially among subjects and can decrease the specificity of the examination. This experiment targets the role of attention in the generation of visual mismatch negativity (vMMN). The visual regularity was generated by a sequence of two radial motions while subjects focused on visual tasks in the central part of the display. Attentional load was systematically varied and had three levels, no-load, easy, and difficult. Rare, deviant, and frequent standard motions were presented with a 10/60 ratio in oddball sequences. Data from 12 subjects was recorded from 64 channels and processed. vMMN was identified within the interval of 142-198 ms. The mean amplitude was evaluated during the aforementioned interval in the parietal and fronto-central regions. A general linear model for repeated measures was applied to the mean amplitude with a three-factor design and showed a significant difference [F (1, 11) = 17.40, p = 0.002] between standard and deviant stimuli and between regions [F (1, 11) = 8.40, p = 0.01]; however, no significant effect of the task [F (2, 22) = 1.26, p = 0.30] was observed. The experiment did not demonstrate an effect of attentional load manipulation on vMMN induced by the motion-sequence, which supports the clinical utility of this examination. However, used stimulation paradigm should be further optimized to generate mismatch negativity that is stable enough to be usable not only for group comparisons but also for a single subject assessment. The manipulation of attention can produce mismatch negativity-like components that are not necessarily connected to the unintentional sensory registration of the violation of probability-based regularity. For clinical purposes, attentional bias should be quantified because it can vary substantially among subjects and can decrease the specificity of the examination. This experiment targets the role of attention in the generation of visual mismatch negativity (vMMN). The visual regularity was generated by a sequence of two radial motions while subjects focused on visual tasks in the central part of the display. Attentional load was systematically varied and had three levels, no-load, easy, and difficult. Rare, deviant, and frequent standard motions were presented with a 10/60 ratio in oddball sequences. Data from 12 subjects was recorded from 64 channels and processed. vMMN was identified within the interval of 142-198 ms. The mean amplitude was evaluated during the aforementioned interval in the parietal and fronto-central regions. A general linear model for repeated measures was applied to the mean amplitude with a three-factor design and showed a significant difference [F (1, 11) = 17.40, p = 0.002] between standard and deviant stimuli and between regions [F (1, 11) = 8.40, p = 0.01]; however, no significant effect of the task [F (2, 22) = 1.26, p = 0.30] was observed. The experiment did not demonstrate an effect of attentional load manipulation on vMMN induced by the motion-sequence, which supports the clinical utility of this examination. However, used stimulation paradigm should be further optimized to generate mismatch negativity that is stable enough to be usable not only for group comparisons but also for a single subject assessment.
dcterms:title
Visual mismatch negativity in the dorsal stream is independent of concurrent visual task difficulty Visual mismatch negativity in the dorsal stream is independent of concurrent visual task difficulty
skos:prefLabel
Visual mismatch negativity in the dorsal stream is independent of concurrent visual task difficulty Visual mismatch negativity in the dorsal stream is independent of concurrent visual task difficulty
skos:notation
RIV/00216208:11150/13:10138972!RIV14-GA0-11150___
n6:predkladatel
n7:orjk%3A11150
n4:aktivita
n16:I n16:P
n4:aktivity
I, P(GA309/09/0869)
n4:cisloPeriodika
July
n4:dodaniDat
n11:2014
n4:domaciTvurceVysledku
n9:9050051 n9:3063038 n9:1987453 n9:8818649 n9:9736344 n9:3111628 n9:8345074
n4:druhVysledku
n15:J
n4:duvernostUdaju
n13:S
n4:entitaPredkladatele
n17:predkladatel
n4:idSjednocenehoVysledku
114192
n4:idVysledku
RIV/00216208:11150/13:10138972
n4:jazykVysledku
n19:eng
n4:klicovaSlova
irrelevant stimulus processing; attention; dorsal stream; magnocellular pathway; visual motion; visual mismatch negativity
n4:klicoveSlovo
n8:visual%20mismatch%20negativity n8:visual%20motion n8:irrelevant%20stimulus%20processing n8:attention n8:magnocellular%20pathway n8:dorsal%20stream
n4:kodStatuVydavatele
CH - Švýcarská konfederace
n4:kontrolniKodProRIV
[7B7D6C1E9E0D]
n4:nazevZdroje
Frontiers in Human Neuroscience
n4:obor
n5:FH
n4:pocetDomacichTvurcuVysledku
7
n4:pocetTvurcuVysledku
7
n4:projekt
n20:GA309%2F09%2F0869
n4:rokUplatneniVysledku
n11:2013
n4:svazekPeriodika
7
n4:tvurceVysledku
Bednář, Michal Szanyi, Jana Kremláček, Jan Langrová, Jana Kuba, Miroslav Vít, František Kubová, Zuzana
n4:wos
000322435300001
s:issn
1662-5161
s:numberOfPages
7
n21:doi
10.3389/fnhum.2013.00411
n10:organizacniJednotka
11150