Corticomuscular Coherence Is Tuned to the Spontaneous Rhythmicity of Speech at 2-3 Hz

Irene Ruspantini, Timo Saarinen, Paolo Belardinelli, Antti Jalava, Tiina Parviainen, Jan Kujala, Riitta Salmelin

Research output: Contribution to journalArticleScientificpeer-review

27 Citations (Scopus)
70 Downloads (Pure)

Abstract

Human speech features rhythmicity that frames distinctive, fine-grained speech patterns. Speech can thus be counted among rhythmic motor behaviors that generally manifest characteristic spontaneous rates. However, the critical neural evidence for tuning of articulatory control to a spontaneous rate of speech has not been uncovered. The present study examined the spontaneous rhythmicity in speech production and its relationship to cortex–muscle neurocommunication, which is essential for speech control. Our MEG results show that, during articulation, coherent oscillatory coupling between the mouth sensorimotor cortex and the mouth muscles is strongest at the frequency of spontaneous rhythmicity of speech at 2–3 Hz, which is also the typical rate of word production. Corticomuscular coherence, a measure of efficient cortex–muscle neurocommunication, thus reveals behaviorally relevant oscillatory tuning for spoken language.
Original languageEnglish
Pages (from-to)3786-3790
Number of pages5
JournalJOURNAL OF NEUROSCIENCE
Volume32
Issue number11
DOIs
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

Keywords

  • corticomuscular coherence
  • rhythmicity of speech

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