Human short-latency auditory responses obtained by cross-correlation

Michael J. Wilson, Robert A. Dobie

Research output: Contribution to journalArticle

18 Scopus citations

Abstract

Short-latency auditory responses were obtained by cross-correlation of continuous, pseudorandom noise stimuli with averaged scalp potentials from adults with normal hearing. Responses were recorded for spectrum levels of 14-74 dB for noise bandwidths from 800 to 6000 Hz. At the lowest intensity level of broadband noise, all 10 subjects showed replicable cross-correlation functions (CCFs), which were characterized by prominent positive peaks at delays (latencies) of 5-7 msec. Male subjects exhibited longer delays than females. Delay (latency) increased with decreasing stimulus intensity. Very early responses (< 2 msec) attributable to cochlear microphonic, which were prominent in earlier work on guinea pigs, were not well seen in these human data. CCFs for responses to band-limited stimuli and off-line derivation of band-limited CCFs for responses evoked by broadband stimuli both showed that this technique is most sensitive to frequency-following behavior at low frequencies (< 800 Hz). However, definite phase-locked responses to even the highest passband (3100-6200 Hz) were seen. These results support the use of the CCF technique as an efficient method of frequency-specific assessment of the auditory system.

Original languageEnglish (US)
Pages (from-to)529-538
Number of pages10
JournalElectroencephalography and Clinical Neurophysiology
Volume66
Issue number6
DOIs
StatePublished - Jun 1987

Keywords

  • Auditory potentials
  • Cross-correlation
  • Frequency-following potentials

ASJC Scopus subject areas

  • Neuroscience(all)
  • Clinical Neurology

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