title: Hemispheric prevalence during chewing in normal right-handed and left-handed subjects: a functional magnetic resonance imaging preliminary study.
abstract: This study evaluated the activation of different cortical areas during nondeliberate chewing of soft and hard boluses in five right-handed and five left-handed subjects with normal occlusion, to determine different hemispheric prevalences. The study was conducted with a functional Magnetic Resonance Imaging (1.5 T Magnetom Vision - Siemens Medical, Germany) using a head coil. The results showed that the most frequently activated areas were Brodmann's areas four and six in the primary motor and premotor cortex, the insula and Broca's area and, overall, showed greater activity of the cortical mastication area (CMA) in the right hemisphere for right-handed and in the left hemisphere for left-handed subjects.
authors.affiliation: University of Turin, Dental School, Via Nizza 230, 10126 Torino, Italy. pietro.bracco@unito.it
authors.forename: Pietro
authors.initials: P
authors.lastname: Bracco
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Anastasi
authors.forename: Maria Grazia
authors.initials: MG
authors.lastname: Piancino
authors.forename: Gianluigi
authors.initials: G
authors.lastname: Frongia
authors.forename: Demetrio
authors.initials: D
authors.lastname: Milardi
authors.forename: Angelo
authors.initials: A
authors.lastname: Favaloro
authors.forename: Placido
authors.initials: P
authors.lastname: Bramanti
mesh_terms: D000328:Adult; D002540:Cerebral Cortex / Q000502:physiology; D002638:Chewing Gum; D003766:Dental Occlusion; D004292:Dominance, Cerebral / Q000502:physiology*; D004576:Electromyography; D005260:Female; D005502:Food; D005625:Frontal Lobe / Q000502:physiology; D007839:Functional Laterality / Q000502:physiology*; D006244:Hardness; D006801:Humans; D021621:Imaging, Three-Dimensional; D008279:Magnetic Resonance Imaging; D008297:Male; D008334:Mandible / Q000502:physiology; D008406:Masseter Muscle / Q000502:physiology; D008409:Mastication / Q000502:physiology*; D009044:Motor Cortex / Q000502:physiology; D009068:Movement; D011187:Posture / Q000502:physiology; D013003:Somatosensory Cortex / Q000502:physiology; D016683:Supine Position / Q000502:physiology; D013703:Temporal Muscle / Q000502:physiology
chemical_list: D002638:Chewing Gum