Spectral analyses of activity of laryngeal and orofacial muscles in stutterers

Anne Smith*, Erich Luschei, Margaret Denny, Jennifer Wood, Minoru Hirano, Steven Badylak

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

31 Scopus citations


Previous studies have reported that the disfluent speech of stutterers is often associated with tremor in orofacial muscle systems. In the present report, spectral analyses of the amplitude envelopes of laryngeal and orofacial EMGs revealed that tremor-like oscillations of EMG activity, similar to those observed in orofacial muscles, are also present in laryngeal muscles during stuttered speech. Furthermore, tremor-like oscillations in orofacial and laryngeal muscles appear to be entrained in some subjects. It is speculated that autonomic systems may provide a mechanism whereby oscillations in different muscle groups may become entrained.

Original languageEnglish
Pages (from-to)1303-1311
Number of pages9
JournalJournal of Neurology, Neurosurgery and Psychiatry
Issue number12
StatePublished - 1993
Externally publishedYes


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