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Normal Swallowing and Functional Magnetic Resonance Imaging: A Systematic Review

Abstract

Unknowns about the neurophysiology of normal and disordered swallowing have stimulated exciting and important research questions. Previously, these questions were answered using clinical and animal studies. However, recent technologic advances have moved brain-imaging techniques such as functional magnetic resonance imaging (fMRI) to the forefront of swallowing neurophysiology research. This systematic review has summarized the methods and results of studies of swallowing neurophysiology of healthy adults using fMRI. A comprehensive electronic and hand search for original research was conducted, including few search limitations to yield the maximum possible number of relevant studies. The participants, study design, tasks, and brain image acquisition were reviewed and the results indicate that the primary motor and sensory areas were most consistently active in the healthy adult participants across the relevant studies. Other prevalent areas of activation included the anterior cingulate cortex and insular cortex. Review limitations and suggested future directions are also discussed.

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Author information

Correspondence to Ianessa A. Humbert PhD.

Additional information

This research was supported by the National Institutes of Health (NIH), NCRR K12 Roadmap, Training and Education to Advance Multidisciplinary-Clinical-Research (TEAM) Program. Project number 8K12RR023268-02.

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Humbert, I.A., Robbins, J. Normal Swallowing and Functional Magnetic Resonance Imaging: A Systematic Review. Dysphagia 22, 266–275 (2007). https://doi.org/10.1007/s00455-007-9080-9

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Keywords

  • Deglutition
  • Deglutition disorders
  • Functional magnetic resonance imaging