Hemispheric prevalence during chewing in normal right-handed and left-handed subjects: a functional magnetic resonance imaging preliminary study.
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.
Bracco
Pietro
P
University of Turin, Dental School, Via Nizza 230, 10126 Torino, Italy. pietro.bracco@unito.it
Anastasi
Giuseppe
G
Piancino
Maria Grazia
MG
Frongia
Gianluigi
G
Milardi
Demetrio
D
Favaloro
Angelo
A
Bramanti
Placido
P
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
D002638:Chewing Gum