下顎運動の両側性皮質制御に関する脳磁場解析  [in Japanese] Neuromagnetic Analysis in the Bilateral Cortical Mechanisms Controlling Mandibular Movement  [in Japanese]

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Author(s)

    • 成田 紀之 NARITA Noriyuki
    • 日本大学松戸歯学部歯科補綴学第三講座 Department of Removable Partial Prosthodontics, Nihon Unoversity School of Dentistry at Matsudo
    • 遠藤 博史 ENDO Hiroshi
    • 生命工学工業技術研究所人間情報部 Department of Human Informatics, National Institute of Bioscience and Human-Techonology

Abstract

Brain activities related to jaw movement were investigated to clarify the cortical control mechanisms from the standpoint of relationships between the type of mandibular movement and the appearance of magnetic fields in the primary sensorimotor cortex using magnetoencephalography (MEG) measurements. Three adult volunteers were asked to conduct movements such as jaw opening, lateral jaw, and finger abductive movements. Motor fields (MF) accompanying jaw opening appeared at bilateral primary sensorimotor cortices, while MF related to lateral jaw and unilateral forefinger abductive movements dominantly appeared in the hemisphere contralateral to the movement side. Further, movement evoked fields (MEF) accompanying jaw opening and lateral jaw movement appeared at bilateral primary sensorimotor cortices, while MEF accompanying unilateral forefinger abductive movement appeared in the hemisphere contralateral to the movement side. Forward dipole of MF was estimated at the primary motor cortex, while backward dipole of MEF was estimated at the primary somatosensory cortex in every session. From these findings, it was assumed that the dominance of activity at the primary motor cortex depends on the direction of mandibular movement, and the proprioceptive feedback afferentation accompanying jaw movements to the primary somatosensory cortex would arise from bilateral orofacial regions.

Journal

  • Nihon Hotetsu Shika Gakkai Zasshi

    Nihon Hotetsu Shika Gakkai Zasshi 43(1), 111-121, 1999-02-10

    Japan Prosthodontic Society

References:  42

Codes

  • NII Article ID (NAID)
    10008172231
  • NII NACSIS-CAT ID (NCID)
    AN00197911
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    03895386
  • Data Source
    CJP  J-STAGE 
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