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August 11, 2015; 85 (6) Clinical/Scientific Notes

CSF leak: A complication from vomiting after magnetic vestibular stimulation

Bryan K. Ward, David S. Zee, David Solomon, Gary L. Gallia, Douglas D. Reh
First published July 8, 2015, DOI: https://doi.org/10.1212/WNL.0000000000001829
Bryan K. Ward
From Johns Hopkins University School of Medicine, Baltimore, MD.
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David S. Zee
From Johns Hopkins University School of Medicine, Baltimore, MD.
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David Solomon
From Johns Hopkins University School of Medicine, Baltimore, MD.
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Gary L. Gallia
From Johns Hopkins University School of Medicine, Baltimore, MD.
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Douglas D. Reh
From Johns Hopkins University School of Medicine, Baltimore, MD.
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Citation
CSF leak: A complication from vomiting after magnetic vestibular stimulation
Bryan K. Ward, David S. Zee, David Solomon, Gary L. Gallia, Douglas D. Reh
Neurology Aug 2015, 85 (6) 551-552; DOI: 10.1212/WNL.0000000000001829

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Sensations of self-motion and vertigo are common among patients and technologists near MRI scanners and especially near stronger magnetic fields.1,2 It was recently discovered that all humans with intact vestibular function have nystagmus the entire time they are in a 7T MRI. This nystagmus is due to a Lorentz force arising from the interaction between the MRI magnetic field and normal ionic currents in the inner ear, which induces labyrinthine stimulation by pushing the endolymph onto the semicircular canal cupula.3–5 The force scales with magnetic field strength, but nystagmus can be seen in magnetic fields of strengths as low as 1.5T.3

Acknowledgments

Acknowledgment: The authors thank Dale Roberts for help with data collection and Krysta Bearish, PA, and Yemissi Sanni for assistance in coordinating the patient's care.

Footnotes

  • Author contributions: Bryan K. Ward: drafting/revising the manuscript, study concept or design, analysis or interpretation of data, accepts responsibility for conduct of research and final approval, acquisition of data, study supervision. David S. Zee: drafting/revising the manuscript, study concept or design, accepts responsibility for conduct of research and final approval. David Solomon: drafting/revising the manuscript, analysis or interpretation of data, accepts responsibility for conduct of research and final approval, acquisition of data. Gary L. Gallia: drafting/revising the manuscript, analysis or interpretation of data, accepts responsibility for conduct of research and final approval, study supervision. Douglas D. Reh: drafting/revising the manuscript, study concept or design, analysis or interpretation of data, accepts responsibility for conduct of research and final approval, study supervision.

  • Study funding: No targeted funding reported.

  • Disclosure: The authors report no disclosures relevant to the manuscript. Go to Neurology.org for full disclosures.

  • Received December 3, 2014.
  • Accepted in final form April 8, 2015.
  • © 2015 American Academy of Neurology
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  • MRI
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