6533b870fe1ef96bd12cfd16
RESEARCH PRODUCT
The human brain processes visual changes that are not cued by attended auditory stimulation.
Tapani KorhonenTimo RuusuvirtaJan WikgrenPiia Astikainensubject
AdultMaleVisual perceptionAdolescentPhotic StimulationMismatch negativityStimulus (physiology)050105 experimental psychology03 medical and health sciencesCerebellar Cortex0302 clinical medicineMental ProcessesmedicineReaction TimeHumans0501 psychology and cognitive sciencesAttentionElectrodesCued speechAnalysis of VarianceGeneral NeuroscienceMemoria05 social sciencesmedicine.anatomical_structureAcoustic StimulationScalpCerebellar cortexEvoked Potentials VisualFemaleCuesPsychologyNeuroscience030217 neurology & neurosurgeryPhotic Stimulationdescription
Event-related potentials (ERPs) to visual stimuli were recorded from the scalp of eight adult humans performing a task in which they counted vowels from a heard story. In the oddball condition, a repeated (standard) light bar of 50 ms in duration was rarely (P = 0.1) replaced by a (deviant) one differing in orientation from the standard. In the control condition, standards were simply omitted from the series and only (alone-) deviants retained. In both conditions, visual stimuli were asynchronous with auditory-task-relevant stimuli. ERPs to deviants significantly differed in amplitude from those to standards in the midline electrodes centrally, parietally and occipitally at 160-200 ms from stimulus onset. Occipitally, such a difference was absent between ERPs to alone-deviants and those to standards. The occipital differential ERPs to deviants, which thus could be found only when standards were present in the series, are discussed in the context of the mismatch negativity (MMN).
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-02-09 | Neuroscience letters |