Visual and Auditory Stimuli Associated with Swallowing: An fMRI Study

DOI 1 Citations 23 References
  • Kawai Takeshi
    Department of Oral Medicine, Oral and Maxillofacial Surgery, Tokyo Dental College
  • Watanabe Yutaka
    Department of Oral Medicine, Oral and Maxillofacial Surgery, Tokyo Dental College
  • Tonogi Morio
    Department of Oral Medicine, Oral and Maxillofacial Surgery, Tokyo Dental College
  • Yamane Gen-yuki
    Department of Oral Medicine, Oral and Maxillofacial Surgery, Tokyo Dental College
  • Abe Shinichi
    Department of Anatomy, Tokyo Dental College
  • Yamada Yoshiaki
    Division of Oral Physiology, Niigata University Graduate School of Medical and Dental Sciences
  • Callan Akiko
    Brain Activity Imaging Center, ATR International

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Abstract

We focused on brain areas activated by audiovisual stimuli related to swallowing motions. In this study, three kinds of stimuli related to human swallowing movement (auditory stimuli alone, visual stimuli alone, or audiovisual stimuli) were presented to the subjects, and activated brain areas were measured using fMRI and analyzed. When auditory stimuli alone were presented, the supplementary motor area was activated. When visual stimuli alone were presented, the premotor and primary motor areas of the left and right hemispheres and prefrontal area of the left hemisphere were activated. When audiovisual stimuli were presented, the prefrontal and premotor areas of the left and right hemispheres were activated. Activation of Broca's area, which would have been characteristic of mirror neuron system activation on presentation of motion images, was not observed; however, activation of brain areas related to swallowing motion programming and performance was verified for auditory, visual and audiovisual stimuli related to swallowing motion. These results suggest that audiovisual stimuli related to swallowing motion could be applied to the treatment of patients with dysphagia.

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