Analysis of cortical activation of silent vocalization using MEG

Gen Yoshimura, Takeshi Uchiyama, Motoichiro Kato

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

To explore the cortical activation of vocalization, we measured evoked magnetic fields (EFs) related to time-locked imaginary vocalization using magnetoencephalography (MEG). We demonstrated a unique procedure which synchronized auditory stimuli with visually presented images, and made comparisons before and after imaginary vocalization. Since MEG measurements have high temporal resolution, we used visual stimuli for subjects who have the timing of silent articulation, and subtracted responses in each case. With this paradigm, brain activities of the right frontotemporal region and right insular area were detected at a latency of around 160 ms. These activations were thought to be the initial brain activity of human vocalization.

Original languageEnglish
Pages (from-to)179-184
Number of pages6
JournalJapan Journal of Logopedics and Phoniatrics
Volume46
Issue number3
DOIs
Publication statusPublished - 2005 Jul

Keywords

  • Cognition
  • Evoked magnetic fields
  • Magnetoencephalography (MEG)
  • Right frontotemporal region
  • Silent vocalization

ASJC Scopus subject areas

  • LPN and LVN
  • Speech and Hearing

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