Temporal resolution of the human primary auditory cortex in gap detection

The temporal resolution of the primary auditory cortex was studied by recording the magnetic middle latency fields (MAEF) evoked by gaps of 3, 6 and 9 ms inserted in the middle of 600 ms broadband noise bursts. Spatio-temporal source modelling showed that a significant neural representation as refle...

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Bibliographic Details
Published inNeuroreport Vol. 13; no. 17; p. 2203
Main Authors Rupp, André, Gutschalk, Alexander, Hack, Sebastian, Scherg, Michael
Format Journal Article
LanguageEnglish
Published England 03.12.2002
Subjects
Acoustic Stimulation
Adolescent
Adult
Auditory Cortex - physiology
Auditory Pathways - physiology
Auditory Perception - physiology
Auditory Threshold - physiology
Evoked Potentials, Auditory - physiology
Female
Functional Laterality - physiology
Humans
Magnetoencephalography
Male
Reaction Time - physiology
Time Perception - physiology
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Summary:The temporal resolution of the primary auditory cortex was studied by recording the magnetic middle latency fields (MAEF) evoked by gaps of 3, 6 and 9 ms inserted in the middle of 600 ms broadband noise bursts. Spatio-temporal source modelling showed that a significant neural representation as reflected by MAEF responses is present at gap durations as low as 3 sms. The comparison of the MAEF waveforms elicited by the onset, gap and offset of the noise bursts indicates that the gap related response near threshold is largely determined by the onset to the burst following the gap. The electro-physiologically derived minimum detectable gap closely resembled the psychoacoustic threshold of 2.0 ms obtained in the same subjects.
ISSN:0959-4965
DOI:10.1097/00001756-200212030-00008