PMID: 15218049Jun 26, 2004Paper

Cortical neuromagnetic fields preceding voluntary jaw movements

Journal of Dental Research
Yoshiyuki ShibukawaY Nakamura

Abstract

Slow cortical potentials (readiness potentials, RPs) reflecting the central programming of voluntary jaw movements were reported to appear preceding the movements. However, the current source producing the RP has not yet been localized. This study aimed to determine the cortical regions involved in the central programming of bilaterally symmetrical voluntary jaw movements, by locating the current source of the neuromagnetic counterpart of the RP (readiness field, RF). The RFs were found in the fronto-lateral region bilaterally, starting around 860 and 600 ms prior to the onset of masseter and digastric electromyograms (EMGs), respectively, and gradually increasing in magnitude to the peak within 100 ms before the EMG onset. Thus, the RFs appeared long before the reported onset of the excitability increase of pyramidal tract neurons. The current sources producing the RFs were located in the precentral gyrus bilaterally, with no bilateral differences in strength. We conclude that the primary motor cortex is involved bilaterally in central programming as well as in execution of bilaterally symmetrical voluntary jaw movements.

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Citations

Oct 20, 2009·Journal of Prosthodontic Research·Takashi IidaAndreas A Ioannides
Aug 2, 2008·NeuroImage·Yohei TamuraTatsuya Ichinohe
Sep 10, 2015·Archives of Oral Biology·Takashi IidaPeter Svensson
Nov 6, 2007·Human Brain Mapping·Inga K TeismannChristo Pantev
Nov 21, 2013·European Journal of Oral Sciences·Takashi IidaPeter Svensson
Nov 17, 2015·IEEE Transactions on Bio-medical Engineering·Natasha AlvesDouglas Cheyne
Mar 26, 2008·Journal of Dental Research·K KuboY Kaneko
May 24, 2007·Journal of Oral Rehabilitation·S Armijo-OlivoC Flores-Mir

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