6533b7d3fe1ef96bd126139e
RESEARCH PRODUCT
Brain reacts to occasional changes in duration of elements in a continuous sound
T. LeppäsaariPihko EHeikki Lyytinensubject
Adultmedicine.medical_specialtyTime FactorsAuditory eventGeneral NeuroscienceBrainMismatch negativityElectroencephalographyAudiologybehavioral disciplines and activitiesElectrophysiologyDiscrimination PsychologicalSoundAcoustic StimulationEvoked Potentials AuditorymedicineHumansPsychologydescription
In order to study the event-related potential correlates of human ability to detect temporal changes within a continuous sound a sound consisting of two alternating pitches of the same constant duration, with infrequent shortenings of one of the tones, was presented to the subjects. The infrequent shortenings were found to elicit a negative component of the auditory event related potential, called the mismatch negativity (MMN). The experimental parameters were chosen to produce a MMN with a minimal contamination of N1, the main negative deflection of an evoked response with the same latency range as MMN and with a short experimental time. The duration of the whole experiment with three different deviant tones was only 11 min. The fast experiment is useful for subjects, for whom a long experiment may be too demanding (infants or patients).
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1995-05-30 | NeuroReport |