Auditory evoked transient and sustained potentials in the human EEG: I. Effects of expectation of stimuli

Research output: Contribution to journalArticleScientificpeer-review


Research units

  • University of Helsinki


The characteristics of auditory evoked transient and sustained potentials were recorded using trains of four-tone stimuli of 1-second duration (interstimulus interval = 1 second) presented once every minute. The subject either attentively expected the stimuli or ignored them while reading. The electroencephalogram was recorded from derivations Cz-Al and Fz-Al. Expectation of the stimuli was associated with increased amplitudes of the transient responses both at the first stimulus of the train and during stimulus repetition. In contrast, the sustained potential at the first stimulus of the train was unchanged or smaller when the subject expected the stimuli. During stimulus repetition, however, the amplitude of the potential was enhanced by expectation of the stimuli. The results support the hypothesis of two sustained potential components and stress the importance of stimulus repetition rate when sustained potentials are studied.


Original languageEnglish
Pages (from-to)297-306
Number of pages10
JournalPsychiatry Research
Issue number3
Publication statusPublished - Dec 1979
MoE publication typeA1 Journal article-refereed

    Research areas

  • Audition, orienting, sustained evoked potentials, transient evoked potentials

ID: 6371080