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May 1986

Evoked Potentials in Trigeminal Neuralgia Associated With Multiple Sclerosis

Author Affiliations

From the Department of Neurosciences, University of California at San Diego (Drs Iragui and Wiederholt); Veterans Administration Medical Center, San Diego (Dr Iragui); and Scripps Clinic and Research Foundation, La Jolla, Calif (Dr Romine).

Arch Neurol. 1986;43(5):444-446. doi:10.1001/archneur.1986.00520050024015

• A 49-year-old man with definite multiple sclerosis suffered an episode of right-sided trigeminal neuralgia (TN) of two weeks' duration, unaccompanied by any other clinical symptoms or signs of exacerbation. Serial evoked potentials, obtained before, during, and after TN, demonstrated developing abnormalities in brain-stem auditory evoked potentials from the right ear that disappeared in a delayed fashion after the clinical symptoms of TN had subsided. This rare combination of clinical and electrophysiologic abnormalities suggests a pontine demyelinating plaque involving the right trigeminal sensory root and the right lateral lemniscus.

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