Late divergence of target and nontarget ERPs in a visual oddball task

Title:

Late divergence of target and nontarget ERPs in a visual oddball task

Creator:

Alena Damborská, Milan Brázdil, Ivan Rektor, Eva Janoušová, Chládek, J., and Miloslav Kukleta

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:cb9f6cfa-e015-47bc-8a0b-ce195b7b9a9f
uuid:cb9f6cfa-e015-47bc-8a0b-ce195b7b9a9f

Subject:

Fyziologie člověka a srovnávací fyziologie, fyziologie člověka, human physiology, intracerebral recording, oddball task, visual evoked potentials, mental counting, memory, 14, and 612

Type:

article, články, model:article, and TEXT

Description:

Different mental operations were expected in the late phase of intracerebral ERPs obtained in the visual oddball task with mental counting. Therefore we searched for late divergences of target and nontarget ERPs followed by components exceeding the temporal window of the P300 wave. Electrical activity from 152 brain regions of 14 epileptic patients was recorded by means of depth electrodes. Average target and nontarget records from 1800 ms long EEG periods free of epileptic activity were compared. Late divergence preceded by almost identical course of the target and nontarget ERPs was found in 16 brain regions of 6 patients. The mean latency of the divergence point was 570±93 ms after the stimulus onset. The target post-divergence section of the ERP differed from the nontarget one by opposite polarity, different latency of the components, or even different number of the components. Generators of post-divergence ERP components were found in the parahippocampal gyrus, superior, middle and inferior temporal gyri, amygdala, and fronto-orbital cortex. Finding of late divergence indicates that functional differences exist even not sooner than during the final phase of the task., A. Damborská ... [et al.]., and Obsahuje seznam literatury

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Source:

Physiological research | 2012 Volume:61 | Number:3

Harvested from:

CDK

Metadata only:

false