Functional connectivity of human chewing: an fcMRI study.
Mastication is one of the most important orofacial functions. The neurobiological mechanisms of masticatory control have been investigated in animal models, but less so in humans. This project used functional connectivity magnetic resonance imaging (fcMRI) to assess the positive temporal correlations among activated brain areas during a gum-chewing task. Twenty-nine healthy young-adults underwent an fcMRI scanning protocol while they chewed gum. Seed-based fcMRI analyses were performed with the motor cortex and cerebellum as regions of interest. Both left and right motor cortices were reciprocally functionally connected and functionally connected with the post-central gyrus, cerebellum, cingulate cortex, and precuneus. The cerebellar seeds showed functional connections with the contralateral cerebellar hemispheres, bilateral sensorimotor cortices, left superior temporal gyrus, and left cingulate cortex. These results are the first to identify functional central networks engaged during mastication.
Department of Biologic and Materials Sciences, School of Dentistry, University of Michigan, Ann Arbor, MI 48109-1078, USA.
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A
Quintero
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Ichesco
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R
Schutt
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C
Myers
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Peltier
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Gerstner
D000328:Adult; D063226:Central Pattern Generators / Q000502:physiology*; D002531:Cerebellum / Q000502:physiology*; D002638:Chewing Gum; D005260:Female; D006179:Gyrus Cinguli / Q000502:physiology; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008409:Mastication / Q000502:physiology*; D008959:Models, Neurological; D009044:Motor Cortex / Q000502:physiology*; D009434:Neural Pathways / Q000503:physiopathology; D056888:Patient Positioning; D013003:Somatosensory Cortex / Q000502:physiology; D013702:Temporal Lobe / Q000502:physiology; D055815:Young Adult
D002638:Chewing Gum