6533b82cfe1ef96bd128f78d
RESEARCH PRODUCT
Mismatch negativity during objective and subjective sleepiness.
Heikki LyytinenMikael Sallinensubject
Adultmedicine.medical_specialtySleep stateCognitive Neurosciencemedia_common.quotation_subjectMismatch negativityExperimental and Cognitive PsychologyStimulus (physiology)Audiologybehavioral disciplines and activitiesDevelopmental psychologyDevelopmental NeuroscienceEvent-related potentialmedicineReaction TimeHumansAttentionBiological Psychiatrymedia_commonEndocrine and Autonomic SystemsElectromyographyGeneral NeuroscienceElectroencephalographyElectrophysiologyAlertnessElectrooculographyNeuropsychology and Physiological PsychologyNeurologyAcoustic StimulationEvoked Potentials Auditorymedicine.symptomPsychologySleeppsychological phenomena and processesSomnolenceVigilance (psychology)description
The mismatch negativity (MMN) and P3 of auditory event-related potentials were studied during subjectively and objectively (physiologically) defined sleepiness under optimal stimulus conditions for MMN elicitation. The MMN and P3 were elicited by either small or large unattended auditory deviants presented to the left ear. The participant's task was to detect either rare auditory targets presented to the right ear or rare changes in the light flashes. Eleven young adults served as participants in a nighttime experiment. The MMN declined especially at Fz and Cz but not so markedly at the right mastoid as either subjective or objective alertness decreased. The amplitude of P3 also decreased during sleepiness. The attenuation of the MMN was paralleled by a decline in behavioral performance. The results show that the MMN is attenuated by a decrease in alertness even before an actual sleep state is reached.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1997-12-24 | Psychophysiology |