Latency of auditory evoked M100 as a function of tone frequency

Timothy P.L. Roberts, David Poeppel

Research output: Contribution to journalArticlepeer-review

Abstract

This study investigated post-stimulus latency of the M100 component of auditory evoked fields as a function of tone frequency. A 37-channel biomagnetometer was used to record neuromagnetic fields over the temporal lobe in response to monaurally presented tones. M100 peaks in evoked field amplitude were found for each subject. The post-stimulus latency was observed to vary parabolically with tone frequency. Latencies as short as 99ms were found in response to mid-audio range frequencies (1000-2000 Hz), whereas lower (100-500Hz) and higher (3000-5000Hz) frequencies were associated with longer latencies (up to 153 ms). All fields gave M100 dipole localizations in auditory cortex. Although it was not possible to resolve spatial tonotopy, it appears that frequency information is encoded in the temporal evoked response.

Original languageEnglish (US)
Pages (from-to)1138-1140
Number of pages3
JournalNeuroReport
Volume7
Issue number6
DOIs
StatePublished - 1996

Keywords

  • Auditory cortex
  • Functional imaging
  • M100
  • Magnetoencephalography (MEG)
  • Tonotopy

ASJC Scopus subject areas

  • Neuroscience(all)

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