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Effects of Stimulus Rate and Number on the Early Components of the Averaged Electroencephalic Response

1972; American Speech–Language–Hearing Association; Volume: 15; Issue: 3 Linguagem: Inglês

10.1044/jshr.1503.559

0022-4685

Robert E. Goldstein, Leslie B. Rodman, Raymond S. Karlovich,

Neural and Behavioral Psychology Studies

No AccessJournal of Speech and Hearing ResearchResearch Article1 Sep 1972Effects of Stimulus Rate and Number on the Early Components of the Averaged Electroencephalic Response Robert Goldstein, Leslie B. Rodman, and Raymond S. Karlovich Robert Goldstein University of Wisconsin, Madison, Wisconsin Google Scholar More articles by this author , Leslie B. Rodman University of Wisconsin, Madison, Wisconsin Google Scholar More articles by this author and Raymond S. Karlovich University of Wisconsin, Madison, Wisconsin Google Scholar More articles by this author https://doi.org/10.1044/jshr.1503.559 SectionsAboutPDF ToolsAdd to favoritesDownload CitationTrack Citations ShareFacebookTwitterLinked In Early components of the AER were studied in relation to rate and number of clicks presented at 50 dB SL in a total of 18 subjects. Twelve subjects were presented 1024 stimuli at 15.0/sec, 9.5/sec, and 7.5/sec; 512 stimuli at 4.7/sec; 256 stimuli at 1.9/sec; and 128 stimuli at 1.0/sec. Two trials were run with rates randomized within each trial. Responses were also fractionated off-line into smaller groups. Three subjects were presented 10,240 stimuli at a rate of 9.5/sec, and three subjects were presented 1024 stimuli at 4.7/sec, 1.9/sec, and 1.0/sec. Mean latency measures for 1024 clicks at 9.5/sec were: Po 13.2 msec, Na 22.7 msec, Pa 34.3 msec, and Nb 49.1 msec, with the largest mean peak-to-peak amplitude, Na–Pa, of 0.73 µv. Peak-to-peak amplitudes were smaller and responses were less “noisy” for greater numbers of stimuli with no apparent effect of rate. Amplitude reduction as a function of number appears to be complete within the first 1024 stimuli. Clinical judgments of response at suprathreshold levels can be made quickly and consistently with as few as 512 stimuli at rates of 9.5/sec and 15.0/sec. 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Wolf and Robert Goldstein Volume 15Issue 3September 1972Pages: 559-566 Get Permissions Add to your Mendeley library HistoryReceived: Aug 24, 1971 Published in issue: Sep 1, 1972PubMed ID: 5080048 Metrics Topicsasha-topicsasha-article-typesCopyright & PermissionsCopyright © 1972 American Speech-Language-Hearing AssociationPDF downloadLoading ...